{"product_id":"zwo-ff131-apo-am5n-bundle","title":"ZWO FF131 APO Refractor w\/ AM5N Astrophotography Bundle","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope:\u003c\/strong\u003e 131mm f\/7.5 Quadruplet Apochromatic Refractor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Circle:\u003c\/strong\u003e 44mm native flat-field, full-frame coverage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e AM5N Harmonic Drive with 33 lb. counterweight-free capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e TC40 Carbon Fiber Tripod (5.07 lb.) and 200mm Pier Extension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl:\u003c\/strong\u003e Hand controller, Wi-Fi, Bluetooth, ASCOM, and ASIAIR compatible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eZWO FF131 APO Refractor w\/ AM5N Astrophotography Bundle\u003c\/h2\u003e\n\u003cp\u003eThis ZWO FF131 APO Refractor w\/ AM5N Astrophotography Bundle combines a 131mm f\/7.5 quadruplet astrograph with the counterweight-free 33 lb. capacity AM5N harmonic mount. The optical tube, weighing 20.72 lb. fully dressed, is carried by the 12.1 lb. mount head with ample margin for a full imaging train. This system is supported by a 5.07 lb. TC40 carbon fiber tripod and a 200mm pier extension, creating a complete, high-resolution imaging platform with a native 44mm flat-field image circle and tracking accuracy of less than ±10 arcseconds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe ZWO FF131 \u0026amp; AM5N Bundle: A Complete 131mm Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eThis bundle is a complete astrophotography system engineered by ZWO for imagers who require large aperture and a portable, high-precision mount. It includes four core components: the FF131-APO quadruplet refractor, the AM5N harmonic drive mount, the TC40 carbon fiber tripod, and the PE200 pier extension. Together, they form a turnkey solution for capturing deep-sky objects with full-frame cameras.\u003c\/p\u003e\n\u003cp\u003eThe system is designed for the serious astrophotographer who wants to minimize setup complexity without sacrificing optical quality or tracking stability. The self-flattening 131mm refractor eliminates the need for external correctors, while the counterweight-free design of the AM5N mount reduces total system weight and setup time. This suits both backyard observatories and trips to remote dark-sky sites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePayload Matching: The 20.72 lb. FF131 on the 33 lb. Capacity AM5N\u003c\/h3\u003e\n\u003cp\u003eThe engineering synergy of this bundle begins with the payload match between the telescope and mount. The FF131-APO optical tube, fully equipped with its handle, mounting rings, and 300mm Losmandy-style dovetail, has a total weight of 20.72 lb. This is well within the 33 lb. counterweight-free capacity of the AM5N mount.\u003c\/p\u003e\n\u003cp\u003eThis leaves a substantial payload margin of over 12 lb. for your imaging equipment. You can confidently add a large sensor camera, a filter wheel, an off-axis guider, and a guide camera without approaching the mount's operational limits. This generous headroom ensures the harmonic drive operates smoothly, delivering its stated tracking accuracy of \u0026lt;±10 arcseconds for sharp, untrailed long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFF131 Quadruplet Optics: A 131mm f\/7.5 Apochromatic Design\u003c\/h3\u003e\n\u003cp\u003eThe heart of this imaging system is the FF131's 4-element quadruplet optical design. With a 131mm (5.15\") aperture and a 983mm focal length, the telescope operates at a native f\/7.5. This apochromatic (\"APO\") design uses four air-spaced lenses, including one ED (Extra-low Dispersion) glass element, to bring different wavelengths of light to a single, sharp focal point. This minimizes chromatic aberration, or color fringing, for high-contrast images with accurate color rendition.\u003c\/p\u003e\n\u003cp\u003eThe 131mm aperture provides significant light-gathering power, allowing you to resolve fine details in distant galaxies and capture faint nebulosity. The 983mm focal length delivers an image scale well-suited for a wide range of deep-sky targets, from medium-sized nebulae like the Dumbbell Nebula (M27) to smaller galaxies, especially when paired with modern high-resolution CMOS sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe FF131's 44mm Image Circle: Native Flat-Field Full-Frame Coverage\u003c\/h3\u003e\n\u003cp\u003eA key feature of the FF131-APO is its self-flattening optical design, which produces a 44mm corrected image circle. This is large enough to cover the 43.3mm diagonal of a full-frame sensor, ensuring sharp, point-like stars across the entire field of view without vignetting. This integrated correction simplifies your imaging train by making a separate field flattener unnecessary.\u003c\/p\u003e\n\u003cp\u003eThis design eliminates the tedious process of calculating and setting a precise back focus distance. Your camera's sensor simply needs to be placed within a generous focus range of 42mm to 73mm from the M48x0.75 thread on the included photography extension tube. This flexibility easily accommodates most filter wheels, off-axis guiders, and camera combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFF131 Mechanics: A 3\" Dual-Speed Focuser with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eThe FF131-APO is equipped with a heavy-duty 3\" rack and pinion focuser designed to carry heavy imaging loads without flexure or slippage. It provides 31mm of focuser travel and features a dual-speed mechanism with a 1:10 ratio fine-adjustment knob, allowing for the precise, critical focus adjustments needed for high-resolution astrophotography.\u003c\/p\u003e\n\u003cp\u003eTo aid in framing your target, the focuser includes a built-in 360° rotator, letting you set your camera's orientation without loosening any connections. The focuser body is also pre-drilled for an EAF (Electronic Automatic Focuser) bracket, allowing for easy integration with ZWO's automated focusing system (sold separately). The retractable dew shield, with a 157mm outer diameter, protects the objective from moisture and stray light while reducing the telescope's transport length to 878mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe AM5N Mount: A 12.1 lb. Head with Harmonic Drive and \u0026lt;±10\" PE\u003c\/h3\u003e\n\u003cp\u003eThe AM5N mount head weighs just 12.1 lb. yet delivers the performance of a much heavier mount. Its strain-wave gear and synchronous belt system provide a high 300:1 reduction ratio, enabling precise tracking with a native periodic error of less than ±10 arcseconds over a 288-second cycle. This level of accuracy, even before autoguiding, is fundamental to capturing sharp, long-exposure images.\u003c\/p\u003e\n\u003cp\u003eThe harmonic drive delivers high torque, which is what allows the mount to handle its 33 lb. payload without counterweights. When moving between targets, the mount can slew at up to 6° per second, minimizing downtime in your imaging sequence. Each mount is factory-tested for periodic error, and a unique performance sheet is included in the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAM5N Control: Equatorial\/Alt-Az Modes, Wi-Fi, and ASCOM\u003c\/h3\u003e\n\u003cp\u003eThe AM5N is a versatile mount that can operate in both Equatorial mode for astrophotography and Alt-Azimuth mode for visual observing. You can control the mount through multiple interfaces, including the included hand controller, a smartphone or tablet via integrated Wi-Fi and Bluetooth, or a PC through its USB port. This flexibility suits any workflow, from a fully wireless field setup to a computer-controlled observatory.\u003c\/p\u003e\n\u003cp\u003eFor advanced imaging, the mount supports both ASCOM and INDI drivers, ensuring compatibility with popular automation software like NINA and SGP. It also integrates into the ZWO ecosystem via the ASIAIR app. A standard ST4 port is also provided for direct connection to an autoguiding camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSupport System: The 5.07 lb. TC40 Tripod and 200mm PE200 Pier\u003c\/h3\u003e\n\u003cp\u003eThis bundle includes a complete support system matched to the mount and telescope. The TC40 tripod uses 1.5\" diameter carbon fiber legs to provide a rigid, vibration-dampening foundation that weighs only 5.07 lb. yet supports up to 110.23 lb. Its height adjusts from 18.5\" to 31.49\", allowing you to achieve a low center of gravity for maximum stability.\u003c\/p\u003e\n\u003cp\u003eTo prevent the 878mm-long FF131 from colliding with the tripod legs when pointing near the zenith, the bundle also includes the PE200 pier extension. This aircraft-grade aluminum extension adds exactly 200mm of height between the tripod and the mount head, ensuring safe clearance for your telescope and camera during automated meridian flips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMount Power System: 12V 3A Operation with Power-Off Protection\u003c\/h3\u003e\n\u003cp\u003eThe AM5N mount requires a stable 12V DC power source capable of delivering at least 3A of current to handle high-torque slews. The mount features an under-voltage protection circuit that will sound an audible alarm if the input voltage drops below 10.8V, alerting you to a potential power issue before it affects tracking.\u003c\/p\u003e\n\u003cp\u003eA critical safety feature is the mount's power-off brake protection. In the event of an unexpected power loss, a mechanical brake on the Right Ascension axis engages automatically. This prevents the telescope from swinging freely, protecting your optical tube and expensive camera from impact damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging with the FF131 \u0026amp; AM5N Bundle: From Setup to Final Frame\u003c\/h3\u003e\n\u003cp\u003eThis bundle is purpose-built for an efficient imaging workflow. After assembling the system, you attach your camera and any accessories like a filter wheel or off-axis guider. With the native flat-field optics, you only need to achieve sharp focus using the 3\" dual-speed focuser; no complex corrector spacing is required. Adding a guide scope to one of the two included findershoes and connecting a guide camera to the ST4 port enables high-precision autoguiding.\u003c\/p\u003e\n\u003cp\u003eFor visual observation, the 3\" focuser accepts a standard 2\" star diagonal. With the AM5N set to Alt-Azimuth mode, you can use a low-power 2\" eyepiece for wide-field views of star clusters or switch to a high-power 1.25\" eyepiece for detailed views of the Moon and planets. The apochromatic optics provide crisp, high-contrast images free of distracting color fringing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFirst Night Setup: A 5-Step Guide to Assembling Your Rig\u003c\/h3\u003e\n\u003cp\u003eGetting this bundle ready for imaging is a streamlined process. The counterweight-free design and matched components simplify assembly, letting you get on sky faster.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1: Assemble the Support.\u003c\/strong\u003e Set up the TC40 tripod and attach the 200mm PE200 pier extension. Level the tripod using its adjustable legs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 2: Mount the AM5N.\u003c\/strong\u003e Secure the 12.1 lb. AM5N mount head to the top of the pier extension. Adjust the latitude setting to match your location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 3: Attach the Telescope.\u003c\/strong\u003e Mount the FF131-APO's 300mm Losmandy-style dovetail into the AM5N's dual saddle. At 20.72 lb., the telescope does not require balancing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 4: Perform Polar Alignment.\u003c\/strong\u003e Connect power to the mount. Use your imaging camera and a software routine, like the one in the ASIAIR app, to perform a precise polar alignment by adjusting the mount's altitude and azimuth controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 5: Focus and Frame.\u003c\/strong\u003e Attach your camera, point to a bright star, and use the 3\" dual-speed focuser to achieve critical focus. Use the 360° rotator to frame your target, and you are ready to begin your imaging session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the ZWO FF131 \u0026amp; AM5N bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is its integration as a complete, high-performance imaging system. The \u003cstrong\u003e20.72 lb. FF131 APO\u003c\/strong\u003e is well matched to the \u003cstrong\u003e33 lb. counterweight-free capacity\u003c\/strong\u003e of the AM5N mount. The telescope's native \u003cstrong\u003e44mm flat-field image circle\u003c\/strong\u003e eliminates the need for a separate flattener, and the included \u003cstrong\u003eTC40 tripod and PE200 pier\u003c\/strong\u003e provide a stable, lightweight support structure with proper clearance. It's a turnkey solution designed for serious astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a field flattener for the ZWO FF131 APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The FF131 APO uses a \u003cstrong\u003e4-element quadruplet optical design\u003c\/strong\u003e that is \"self-flattening.\" It produces a corrected 44mm image circle natively, so no additional flattener or reducer is required. This simplifies the imaging train and removes the need for precise back focus calculations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AM5N mount's 33 lb. capacity enough for the FF131 plus my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The FF131 weighs 20.72 lb. with its rings, handle, and dovetail. This leaves over 12 lb. of remaining capacity on the AM5N's 33 lb. rating. This is ample margin for a full-frame astronomy camera, filter wheel, off-axis guider, and guide camera without stressing the mount's harmonic drive system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the PE200 pier extension included in this bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FF131 refractor has a retracted tube length of \u003cstrong\u003e878mm\u003c\/strong\u003e. When pointed near the zenith (straight up), a long telescope can collide with the tripod legs during a meridian flip. The included \u003cstrong\u003e200mm pier extension\u003c\/strong\u003e adds critical height between the mount and the tripod, ensuring the telescope and your camera have safe clearance to move across the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I polar align the AM5N mount since it has no polar scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AM5N is designed for software-assisted polar alignment. You use your main imaging camera or a guide camera to take images of the sky near the pole. A software application such as the ZWO ASIAIR app guides you through making adjustments to the mount's altitude and azimuth knobs until alignment is precise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ZWO bundle for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The AM5N mount can be set to Alt-Azimuth mode, which is more intuitive for visual use. The FF131's 3\" focuser accepts a standard 2\" star diagonal and eyepieces. The apochromatic optics provide excellent, high-contrast views of the Moon, planets, and bright deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power supply do I need for the ZWO AM5N mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need a DC power source that can supply \u003cstrong\u003e12V and at least 3A\u003c\/strong\u003e. This can be a portable 12V lithium battery pack or an AC-to-DC adapter. The 3A rating is important to ensure the mount has enough power for high-speed slews. The mount will beep if the voltage drops below 10.8V.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow portable is the ZWO FF131 \u0026amp; AM5N bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe bundle is designed for portability. The AM5N mount head weighs only \u003cstrong\u003e12.1 lb.\u003c\/strong\u003e, the TC40 tripod is \u003cstrong\u003e5.07 lb.\u003c\/strong\u003e, and no heavy counterweights are needed. The main weight is the telescope at 20.72 lb. While not a small \"grab-and-go\" setup, the total weight is significantly less than a traditional equatorial mount system with similar aperture and payload capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the FF131 \u0026amp; AM5N bundle frame a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a \u003cstrong\u003e983mm focal length\u003c\/strong\u003e and a full-frame camera, the FF131 can capture the bright core and a large portion of the spiral arms of the Andromeda Galaxy (M31). However, fitting the entire galaxy, including its faint outer extensions, would likely require a multi-panel mosaic. The image scale is excellent for medium-sized targets like the Triangulum Galaxy (M33) or the Orion Nebula (M42).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO FF131 \u0026amp; AM5N bundle a good choice for a permanent backyard observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While its portability is a key feature, the bundle's high precision and payload capacity make it an excellent choice for a permanent setup. The \u003cstrong\u003e\u0026lt;±10\" periodic error\u003c\/strong\u003e of the AM5N provides a solid foundation for autoguiding, and the \u003cstrong\u003e131mm aperture\u003c\/strong\u003e of the FF131 is large enough for serious deep-sky imaging from a fixed location. You can also increase the mount's capacity to \u003cstrong\u003e44.09 lb.\u003c\/strong\u003e by adding an optional counterweight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software is compatible with the ZWO AM5N mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AM5N is compatible with a wide range of software. You can use ZWO's own mobile apps like \u003cstrong\u003eASIAIR\u003c\/strong\u003e or \u003cstrong\u003eSkyAtlas\u003c\/strong\u003e via Wi-Fi for computer-free control. For PC-based control, it supports \u003cstrong\u003eASCOM\u003c\/strong\u003e and \u003cstrong\u003eINDI\u003c\/strong\u003e drivers, making it compatible with popular software such as NINA, SGP, and MaxIm DL.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eBundle Components\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items\u003c\/td\u003e\n\u003ctd\u003eZWO FF131-APO telescope, AM5N mount, TC40 tripod, PE200 pier extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eTelescope: ZWO FF131 APO\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eApochromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e131mm (5.15\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e983 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Elements\u003c\/td\u003e\n\u003ctd\u003e4 (Quadruplet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44 mm (full frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Rack \u0026amp; Pinion, Dual Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Range\u003c\/td\u003e\n\u003ctd\u003e42-73 mm from M48x0.75 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Connection\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 male and M54x0.75 male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e17.42 lb. (20.72 lb. with handle, rings and dovetail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length (retracted)\u003c\/td\u003e\n\u003ctd\u003e878 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e125 mm (dew shield 157 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003e300 mm Losmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eMount: ZWO AM5N\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-AM5N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eNew Wave Harmonic Equatorial \/ Alt-Az\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight Capacity\u003c\/td\u003e\n\u003ctd\u003e33 lb. (without counterweight), 44.09 lb. (with counterweight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Head Weight\u003c\/td\u003e\n\u003ctd\u003e12.1 lb.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive System\u003c\/td\u003e\n\u003ctd\u003eHarmonic Drive and Synchronous belt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction Ratio\u003c\/td\u003e\n\u003ctd\u003e300:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeriodic Error\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;±10\" (288 s period)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStepper Motor Resolution\u003c\/td\u003e\n\u003ctd\u003e0.17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Slew Speed\u003c\/td\u003e\n\u003ctd\u003e6°\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLatitude Range\u003c\/td\u003e\n\u003ctd\u003e0° - 90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAzimuth Adjustment\u003c\/td\u003e\n\u003ctd\u003e±6°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaddle Type\u003c\/td\u003e\n\u003ctd\u003eDual Vixen\/Losmandy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eHand controller, Wi-Fi, Bluetooth, USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivers\u003c\/td\u003e\n\u003ctd\u003eASCOM, INDI, ASIAIR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Ports\u003c\/td\u003e\n\u003ctd\u003eUSB, ST4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirements\u003c\/td\u003e\n\u003ctd\u003e12V - 3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Failure Protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eTripod: ZWO TC40\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLeg Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight Capacity\u003c\/td\u003e\n\u003ctd\u003e110.23 lb.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod Weight\u003c\/td\u003e\n\u003ctd\u003e5.07 lb.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight Range\u003c\/td\u003e\n\u003ctd\u003e18.5\" to 31.49\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Leg Diameter\u003c\/td\u003e\n\u003ctd\u003e1.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePier Extension: ZWO PE200\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eZWO PE200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight Extension\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAircraft-Grade Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003eup to 50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eZWO AM5 Mount; ZWO TC40, 1.75” iOptron \u0026amp; Sky-Watcher, 2” Celestron AVX tripods\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO 131 mm APO Refractor OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e300 mm Losmandy-Style Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFindershoes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePhotography Extension Tube\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTelescope User Manual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAM5N Mount Body\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHand Controller\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHand Controller Cable (2m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMount Hard Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB 2.0 Type B to Type A Cable (2m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB 2.0 Type C to Type A Cable (1m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMount Performance Sheet\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMount Quick Guide\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO TC40 Carbon Fiber Tripod\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO 200mm Pier Extension\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eM6 Allen Key\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eWarranty Card\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInspection Card\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/wp-content\/uploads\/2026\/06\/98c8207aa35d1cf16d092579eae1387c.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFF131-APO Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/wp-content\/uploads\/2026\/03\/b063feaca7a20b4c23090773c351e501.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAM5N Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe ZWO FF131 APO telescope is covered by a 1-year warranty, and the ZWO AM5N mount is covered by a 2-year warranty. For complete details, please see the \u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO Warranty\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":67945435955485,"sku":"ZWO-ZH131APO-1","price":4846.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/zwo-ff131-apo-am5n-bundle-1.jpg?v=1793650011","url":"https:\/\/davidastro.com\/en-us\/products\/zwo-ff131-apo-am5n-bundle","provider":"David Astro","version":"1.0","type":"link"}