{"product_id":"william-optics-m-caa54","title":"William Optics M54 Camera Angle Rotator (CAA)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e360° of precise framing rotation\u003c\/li\u003e\n\u003cli\u003eStandard M54 male and female threads\u003c\/li\u003e\n\u003cli\u003eAdds a minimal 30.2 mm to the optical path\u003c\/li\u003e\n\u003cli\u003eSecurely locks orientation for long exposures\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\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\u003eWilliam Optics M54 Camera Angle Rotator (CAA)\u003c\/h2\u003e\n\u003cp\u003eThe William Optics M54 Camera Angle Rotator (CAA) provides 360° of precise framing adjustment for your imaging train, inserting between your flattener and camera while adding only 30.2 mm to your optical path. This essential accessory allows you to perfectly compose targets like elongated galaxies or sprawling nebulae without loosening your camera or disrupting your optical alignment.\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\u003e360° Framing with a 30.2mm Optical Path\u003c\/h3\u003e\n\u003cp\u003eAchieving the perfect image orientation is critical, and the WO M54 CAA makes it simple. A smooth rotational mechanism allows for fine, controlled adjustments to match your camera sensor to the dimensions of your target. The rotator's key design consideration is its 30.2 mm optical length, a fixed value that must be factored into your back focus calculations to ensure a flat field.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54 Thread Standard:\u003c\/strong\u003e Features M54x0.75 male and female threads, ensuring compatibility with a wide ecosystem of William Optics flatteners, reducers, and many third-party cameras and accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Back Focus Integration:\u003c\/strong\u003e The 30.2 mm thickness is a known constant, allowing you to accurately subtract it from your required back focus distance and fill the remaining gap with standard M54 spacers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Mechanism:\u003c\/strong\u003e Once you've set your desired frame, a secure locking screw holds the rotator firmly in place, preventing any drift during a long 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\"\u003eHow do I install the William Optics M54 CAA in my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe WO M54 CAA is designed to be threaded between two M54-compatible components. Typically, you would thread it directly onto the M54 output of your field flattener or reducer, and then attach your M54 spacers and camera to the female side of the rotator.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 30.2 mm optical length of the WO M54 Rotator affect my back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003e30.2 mm optical length\u003c\/strong\u003e is a critical measurement that consumes part of your total back focus distance. If your flattener requires 55 mm of back focus, installing the rotator means you will need an additional 24.8 mm of spacers (55 - 30.2 = 24.8) between the rotator and your camera sensor to achieve a perfectly flat field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the William Optics M54 CAA compatible with non-William Optics telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. As long as your telescope's flattener, reducer, or camera system uses the standard \u003cstrong\u003eM54x0.75 thread\u003c\/strong\u003e, the William Optics CAA will be compatible. It is not proprietary to William Optics telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would I use the WO M54 Camera Angle Rotator for imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Andromeda Galaxy (M31) is a very wide, elliptical target. To fit its full span onto a rectangular camera sensor, you often need to orient the long axis of your sensor with the long axis of the galaxy. The WO M54 CAA allows you to make this fine rotational adjustment to perfectly frame M31 without rotating your entire, heavier imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the WO M54 CAA with a filter wheel and off-axis guider?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The rotator is typically placed first in the imaging train after the flattener. This allows you to rotate the entire subsequent assembly—including the off-axis guider, filter wheel, and camera—as a single locked unit. This ensures your guide camera maintains its orientation relative to the main imaging camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the WO M54 CAA lock its position once I have the correct framing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics M54 CAA features a knurled thumbscrew on its side. Once you have rotated your camera to the desired angle, you simply tighten this screw. This applies pressure and securely locks the rotational position, preventing any unwanted movement during your exposure sequence.\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\n\u003ctd\u003eInput Connection\u003c\/td\u003e\n\u003ctd\u003eM54 (male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Connection\u003c\/td\u003e\n\u003ctd\u003eM54 (female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Path Length\u003c\/td\u003e\n\u003ctd\u003e30.2 mm\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\"\u003eWilliam Optics M54 Camera Angle Rotator\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":52853691515165,"sku":"WO-M-CAA54","price":164.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/WilliamOptics-WO-Camera-Angle-Rotator-CAA-1_efbd93d4-61ab-4595-97c1-598bafd288c7.jpg?v=1788457860","url":"https:\/\/davidastro.com\/fr\/products\/william-optics-m-caa54","provider":"David Astro","version":"1.0","type":"link"}