{"product_id":"zwo-ff90-apo-am3n-bundle","title":"ZWO FF90 APO Refractor w\/ AM3N Astrophotography Bundle","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope:\u003c\/strong\u003e ZWO FF90 90mm f\/6.8 Quadruplet APO Refractor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e ZWO AM3N Harmonic Drive GoTo Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTripod:\u003c\/strong\u003e ZWO TC40 Carbon Fiber Tripod\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePier Extension:\u003c\/strong\u003e ZWO PE160 160mm Pier Extension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Weight:\u003c\/strong\u003e 9.97 lb. with rings and dovetail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Head Weight:\u003c\/strong\u003e 9.04 lb.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Payload:\u003c\/strong\u003e 17.64 lb. counterweight-free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Circle:\u003c\/strong\u003e 44mm (full-frame 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 FF90 APO Refractor w\/ AM3N Astrophotography Bundle\u003c\/h2\u003e\n\u003cp\u003eThis ZWO FF90 APO Refractor w\/ AM3N Astrophotography Bundle combines a 90mm self-flattening quadruplet refractor with a 9.04 lb. harmonic drive mount, a 5.07 lb. carbon fiber tripod, and a 160mm pier extension into a complete, portable imaging system. The FF90 APO's f\/6.8 optics produce a 44mm image circle for full-frame cameras, while the AM3N mount supports its 9.97 lb. weight with a counterweight-free payload capacity of 17.64 lb. Every AM3N is factory-tested to deliver a periodic error of less than ±15 arcseconds, providing a precise tracking foundation for the 609mm focal length optical tube.\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 90mm APO \u0026amp; AM3N Bundle: A Complete Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eThis bundle is engineered as a cohesive solution for portable deep-sky astrophotography. It pairs the ZWO FF90 APO's full-frame optical performance with the high payload-to-weight ratio of the AM3N harmonic mount. The system is completed by the lightweight TC40 carbon fiber tripod and PE160 pier extension, creating a stable platform that is easy to transport and quick to set up at a dark-sky site.\u003c\/p\u003e\n\u003cp\u003eThe components are designed to work together. The telescope's 9.97 lb. weight fits comfortably within the mount's 17.64 lb. capacity, the pier extension ensures the telescope clears the tripod legs when pointing high, and the mount's versatile control options integrate directly with ZWO's ASIAIR ecosystem or standard PC software.\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\u003eAM3N Payload: A 7.67 lb. Margin for the 9.97 lb. FF90 APO\u003c\/h3\u003e\n\u003cp\u003eThe ZWO AM3N mount is rated to carry 17.64 lb. without a counterweight. With the FF90 APO weighing 9.97 lb. fully dressed with its handle, rings, and dovetail, you have a 7.67 lb. margin for your camera, guide scope, filter wheel, and other accessories. This generous headroom ensures the mount operates well within its design limits, which is critical for maintaining tracking accuracy during long exposures.\u003c\/p\u003e\n\u003cp\u003eBy eliminating the need for counterweights, the total system weight is significantly reduced, enhancing portability. The combination of a 9.04 lb. mount head and a 9.97 lb. telescope creates a powerful imaging rig that remains manageable for a single person to carry and assemble in the field.\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\u003eFF90 Optics: A 90mm f\/6.8 Self-Flattening Quadruplet\u003c\/h3\u003e\n\u003cp\u003eThe optical core of this system is the FF90's 90mm aperture, 609mm focal length (f\/6.8) quadruplet lens assembly. This four-element, air-spaced design is \"self-flattening,\" meaning it corrects for field curvature internally without requiring a separate field flattener accessory. This simplifies your imaging train and eliminates complex back-focus calculations.\u003c\/p\u003e\n\u003cp\u003eOne of the four elements is made from Extra-Low Dispersion (ED) glass to minimize chromatic aberration, resulting in sharp stars with well-controlled color. At f\/6.8, the telescope gathers light efficiently, allowing you to capture deep signal on faint targets like the Triangulum Galaxy (M33) with shorter sub-exposure times than a slower instrument would need.\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\u003eA 44mm Image Circle for Full-Frame Astrophotography\u003c\/h3\u003e\n\u003cp\u003eThe FF90 APO is engineered to produce a fully illuminated and corrected 44mm image circle. This is large enough to cover full-frame sensors (36x24mm), allowing you to take full advantage of their wide fields of view. You can pair this telescope with DSLRs, mirrorless cameras, or dedicated full-frame astronomy cameras without vignetting or distorted stars at the edge of the frame.\u003c\/p\u003e\n\u003cp\u003eBecause the field is natively flat, you simply attach your camera and focus. The focuser provides a focus range of 45mm to 75mm from the M48x0.75 thread, accommodating most cameras, filter wheels, and off-axis guiders without needing a large collection of extension tubes.\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 3\" Dual-Speed Rack \u0026amp; Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eTo support heavy, full-frame imaging trains, the FF90 APO is equipped with a rigid 3\" rack and pinion focuser. Its dual-speed 1:10 fine-focus knob allows for precise adjustments, which are essential for achieving critical focus with modern high-resolution sensors. The focuser body also includes pre-drilled mounting holes for a ZWO EAF (Electronic Automatic Focuser, sold separately) for automated focusing routines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Rotator:\u003c\/strong\u003e A built-in rotator with a degree scale allows you to frame your target without loosening the camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Connections:\u003c\/strong\u003e The included photography extension tube provides standard M54x0.75 and M48x0.75 male threads for direct connection to most astronomy cameras and T-rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Integration:\u003c\/strong\u003e The M48 adapter has built-in threads for mounting a standard 2\" filter inside the imaging train.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAM3N Strain-Wave Drive: \u0026lt;±15\" Periodic Error Without Counterweights\u003c\/h3\u003e\n\u003cp\u003eThe AM3N mount uses a strain-wave gear system with a 300:1 reduction ratio, delivering high torque and smooth tracking from a compact, 9.04 lb. body. This design eliminates the need for counterweights for payloads up to 17.64 lb. Every AM3N unit is tested at the factory and ships with a performance sheet verifying its periodic error is less than ±15 arcseconds over its 288-second cycle.\u003c\/p\u003e\n\u003cp\u003eThis high native tracking accuracy minimizes the work your autoguider has to do, resulting in rounder stars during long exposures. For even higher precision, an ST4 autoguider port is available for connecting a guide 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\u003eDual-Mode Control from 0° to 90° Latitude\u003c\/h3\u003e\n\u003cp\u003eThe AM3N is engineered for both equatorial (EQ) and alt-azimuth (Alt-Az) operation, switchable via the included hand controller. Use EQ mode for serious, polar-aligned astrophotography, or switch to Alt-Az for quick, simple GoTo visual observing sessions. The mount's mechanical design supports a full latitude range of 0° to 90°, making it usable anywhere on Earth.\u003c\/p\u003e\n\u003cp\u003eControl is managed through multiple interfaces. The mount has integrated WiFi and Bluetooth for wireless connection to ZWO's ASI Mount and SkyAtlas mobile apps. It is fully compatible with the ASIAIR platform and supports ASCOM and INDI drivers for control from PC-based software like NINA or SGP via its USB port.\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 5.07 lb. TC40 Tripod and 160mm Pier Extension\u003c\/h3\u003e\n\u003cp\u003eThe foundation of this bundle is the ZWO TC40 tripod, which provides stability from a frame weighing only 5.07 lb. Its carbon fiber legs have a maximum diameter of 1.5\" and dampen vibrations effectively, while supporting a 110.23 lb. load. The adjustable height range of 18.5\" to 31.49\" allows you to level the system on uneven terrain.\u003c\/p\u003e\n\u003cp\u003eThe included PE160 Pier Extension adds a critical 6.30\" (160mm) of height between the tripod and the mount head. This clearance prevents the 513mm-long FF90 APO or your attached camera from colliding with the tripod legs when tracking objects high in the sky, especially past the meridian.\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\u003e12V @ 3A Power System with Power-Off Brake Protection\u003c\/h3\u003e\n\u003cp\u003eThe AM3N mount operates on a standard 12V DC power supply and requires at least 3A of current. It features a critical safety system: a power-off brake on the Right Ascension axis. If power is accidentally lost, the brake engages instantly to stop the telescope from swinging, protecting your optics and camera from damage.\u003c\/p\u003e\n\u003cp\u003eFor cleaner cable management, the dovetail saddle integrates a 12V DC power output and a Type-C USB port. This allows you to power an ASIAIR, camera, or other accessories directly from the mount head, reducing the risk of cables snagging as the mount slews.\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 at 609mm: Framing the Andromeda Galaxy (M31)\u003c\/h3\u003e\n\u003cp\u003eThe FF90's 609mm focal length provides a useful image scale for a wide range of deep-sky objects. When paired with a full-frame sensor, the field of view is approximately 3.4° x 2.3°. This is wide enough to capture the entirety of the Andromeda Galaxy (M31) and its satellite galaxies M32 and M110 in a single frame.\u003c\/p\u003e\n\u003cp\u003eFor smaller targets, the 90mm aperture resolves fine detail. You can effectively frame objects like the Whirlpool Galaxy (M51) or the Eagle Nebula (M16), capturing both the bright core and fainter outer structures. The system's portability makes it an excellent choice for traveling to dark sites to image large, dim targets like the North America Nebula (NGC 7000).\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\u003eZWO FF90 vs. FF70: 65% More Light-Gathering Power\u003c\/h3\u003e\n\u003cp\u003eWhen choosing between ZWO's quadruplet refractors, the FF90 offers significant advantages in light grasp and image scale over the smaller FF70. While the FF70 is lighter and provides a wider true field, the FF90 is better suited to resolving finer detail and capturing fainter objects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Gathering:\u003c\/strong\u003e The 90mm objective of the FF90 gathers approximately 65% more light than a 70mm objective. This translates directly to shorter exposure times or the ability to record fainter nebulosity and galaxy details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Scale:\u003c\/strong\u003e With a 609mm focal length, the FF90 provides more magnification than the FF70. This makes it better suited for framing small to medium-sized deep-sky objects where resolution is key.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight Trade-off:\u003c\/strong\u003e The trade-off for increased aperture is weight. The FF90 OTA weighs 9.97 lb. fully configured, making it a good match for the AM3N's 17.64 lb. counterweight-free capacity.\u003c\/li\u003e\n\u003c\/ul\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 with the FF90 and AM3N Bundle\u003c\/h3\u003e\n\u003cp\u003eSetting up this bundle is designed to be straightforward. Start by extending the TC40 tripod legs and leveling the head. Attach the PE160 pier extension, followed by the AM3N mount head. With the mount in equatorial mode, adjust its latitude to match your location using the 0°-90° scale.\u003c\/p\u003e\n\u003cp\u003eNext, attach the 230mm Vixen-style dovetail of the FF90 APO to the mount's dual saddle and secure it. Because the mount does not require precise balance, you can simply center the telescope on the saddle. After attaching your camera, power on the mount and perform your polar alignment routine using polar alignment software such as the ASIAIR app. Once aligned, you are ready to use the hand controller or app to slew to your first target and begin focusing.\u003c\/p\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\"\u003eIs the AM3N's 17.64 lb. payload sufficient for the 9.97 lb. ZWO FF90 APO and a camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The ZWO FF90 APO weighs 9.97 lb. with its rings and dovetail, leaving a 7.67 lb. margin for your camera, guide scope, filter wheel, and other accessories. This keeps the total payload well under the mount's 17.64 lb. counterweight-free capacity, ensuring stable and accurate tracking for long-exposure 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 FF90 APO in this bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The ZWO FF90 APO features a 4-element quadruplet optical design that is \"self-flattening.\" It delivers a flat 44mm image circle without needing an external flattener or reducer, simplifying your imaging train and eliminating complex back-focus spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will this ZWO FF90 and AM3N bundle frame the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis setup suits that target. The FF90's 609mm focal length on a full-frame sensor yields a field of view of about 3.4° x 2.3°. This is wide enough to comfortably frame the entire bright disk of the Andromeda Galaxy (M31), along with its two prominent satellite galaxies, M32 and M110, all in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the included PE160 pier extension in the FF90 and AM3N bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe PE160 adds 160mm (6.30 inches) of height between the tripod and the mount. This clearance is critical to prevent the end of the FF90 APO refractor or your camera from colliding with the tripod legs when the telescope points near the zenith or performs a meridian flip. It enables uninterrupted, automated imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to precisely balance the ZWO FF90 APO on the AM3N mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, one of the main advantages of the AM3N's strain-wave drive is that it does not require counterweights or precise balancing for payloads under 17.64 lb. You should, however, ensure the telescope is centered on the saddle to maintain a stable center of gravity and prevent any risk of the setup tipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the AM3N mount in this bundle for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The AM3N features a dual-mode design. While its primary function in this bundle is for polar-aligned equatorial tracking for photography, you can easily switch it to Alt-Azimuth mode via the hand controller. This provides a simple, intuitive GoTo platform for quick visual sessions without the need for polar alignment.\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 FF90 and AM3N bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe bundle's active component, the AM3N mount, requires a 12V DC power supply capable of delivering at least 3A. The telescope itself is passive and requires no power. You will need to provide your own power source, such as a portable battery pack or an AC-to-DC adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the ZWO FF90 and AM3N bundle with software like NINA or SGP?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The ZWO AM3N mount is fully compatible with third-party software through its ASCOM driver for Windows (INDI is also supported). After installing the necessary drivers, you can connect the mount to your PC via its USB port and control it directly from applications like NINA, SGP, or MaxIm DL.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach a full-frame DSLR to the ZWO FF90 APO refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FF90 APO's included photography extension tube terminates in a standard M48x0.75 male thread. To connect your DSLR or mirrorless camera, you will only need a camera-specific M48 T-ring that matches your camera's lens mount. The T-ring attaches to your camera body and then threads directly onto the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2\" filters with the ZWO FF90 APO in this bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The photographic extension tube includes an adapter with built-in female M48x0.75 threads. This allows you to mount a standard 2\" astronomy filter directly into the imaging train, positioned just before your camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO FF90 and AM3N bundle a good choice for imaging the Rho Ophiuchi cloud complex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. The Rho Ophiuchi complex is a large, faint target that benefits from a portable setup taken to a dark-sky site. The bundle's 9.04 lb. mount head, 5.07 lb. tripod, and counterweight-free design make it easy to transport. The FF90's f\/6.8 optics and 90mm aperture are well-suited for capturing the faint dust and nebulosity in this region.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the FF90 APO show chromatic aberration on bright stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FF90 APO's quadruplet design includes one ED (Extra-Low Dispersion) glass element specifically to reduce chromatic aberration (false color). While no refractor can completely eliminate all false color on the brightest stars like Vega, this design provides excellent color correction, resulting in sharp, high-contrast images with minimal purple fringing.\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\u003eBundle Includes\u003c\/td\u003e\n\u003ctd\u003eZWO FF90-APO telescope, AM3N mount, TC40 tripod, PE160 pier extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eZWO FF90 APO Telescope Specifications\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\u003eNumber of Elements\u003c\/td\u003e\n\u003ctd\u003e4 (Quadruplet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e90mm (3.54\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e609 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Speed\u003c\/td\u003e\n\u003ctd\u003eDual Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Range\u003c\/td\u003e\n\u003ctd\u003e45-75 mm from the M48x0.75 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera 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\u003e8.64 lb. (9.97 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\u003e513 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e96 mm (dew shield 114 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003e230 mm Vixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eZWO AM3N Mount Specifications\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Category\u003c\/td\u003e\n\u003ctd\u003eNew Wave Harmonic GoTo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePayload Capacity\u003c\/td\u003e\n\u003ctd\u003e17.64 lb. (no counterweight), 28.66 lb. (with counterweight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Head Weight\u003c\/td\u003e\n\u003ctd\u003e9.04 lb.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaddle Type\u003c\/td\u003e\n\u003ctd\u003eDual Vixen \u0026amp; Losmandy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeriodic Error\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;±15\" (288 s period)\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 Range\u003c\/td\u003e\n\u003ctd\u003e+\/- 6°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlew Speeds\u003c\/td\u003e\n\u003ctd\u003eUp to 6°\/second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eAMH hand controller, Wi-Fi, Bluetooth, USB; ASCOM, INDI, ASIAIR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoguider Port\u003c\/td\u003e\n\u003ctd\u003eST4\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\n\u003ctd\u003eIntegrated WiFi\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHand Controller\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolar Scope\u003c\/td\u003e\n\u003ctd\u003eNot Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounterweight Shaft Thread\u003c\/td\u003e\n\u003ctd\u003eM12 x 1.75 (bar not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eZWO TC40 Tripod Specifications\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\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eZWO PE160 Pier Extension Specifications\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e6.30\" (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e13 kg max (10 kg recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.0 kg\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\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO 90 mm APO Refractor OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eVixen Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAM3N Mount Body\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMount Carrying Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTC40 Carbon Fiber Tripod\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO 160mm Pier Extension\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHand Controller Cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2m USB 2.0 Cable (Type B to A)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1m USB 2.0 Cable (Type C to A)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eQuick Guide Brochure\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\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\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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\/64c65c903ed8a4e5e1da009eb87fc77d.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\"\u003eFF90-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\/04\/8ed7327e2b2f8879fb41beacbe80114b.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\"\u003eAM3N 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\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO Warranty\u003c\/a\u003e\n\u003cp\u003eZWO provides a 2-year warranty for the AM3N harmonic equatorial mount and a 1-year warranty for the FF90 APO telescope. Please see the linked policy for complete details.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":67945434251549,"sku":"ZWO-ZH90APO-1","price":2946.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/zwo-ff90-apo-am3n-bundle-1.jpg?v=1793649965","url":"https:\/\/davidastro.com\/en-int\/products\/zwo-ff90-apo-am3n-bundle","provider":"David Astro","version":"1.0","type":"link"}