{"product_id":"baader-planetarium-m54-fine-adjustment-rings-aluminium","title":"Baader Planetarium M54 Fine-Adjustment Rings - Aluminium","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003ePrecision M54 x 0.75 fine-adjustment spacer rings\u003c\/li\u003e\n\u003cli\u003eAvailable as a 3-ring set (0.3 \/ 0.5 \/ 1mm) or as single 0.3mm, 0.5mm or 1mm rings\u003c\/li\u003e\n\u003cli\u003eProvides fine control over rotational orientation\u003c\/li\u003e\n\u003cli\u003eEnables precise back focus tuning\u003c\/li\u003e\n\u003cli\u003eMachined from lightweight aluminum\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\u003eM54 Fine-Adjustment Rings - Aluminium\u003c\/h2\u003e\n\u003cp\u003eThe M54 Fine-Adjustment Rings are precision-machined aluminum spacers in 0.3mm, 0.5mm, and 1mm thicknesses that solve critical spacing and orientation challenges in your imaging train. Choose the complete set of all three rings or a single ring in the thickness you need. The rings allow incremental adjustments equivalent to approximately 2\/5, 2\/3, and 1 1\/3 turns of an M54 thread, giving you exact control over back focus and the final rotational position of your camera or filter wheel.\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\u003e0.3mm, 0.5mm, and 1mm Spacing for M54 Thread Alignment\u003c\/h3\u003e\n\u003cp\u003eWhen connecting threaded components, the final orientation is often unpredictable, leaving your camera at an awkward angle. These M54 rings act as micro-shims, allowing you to control exactly where threads bottom out. By adding a 0.3mm, 0.5mm, or 1mm ring, you can precisely adjust the final rotational angle of any M54 accessory.\u003c\/p\u003e\n\u003cp\u003eThese rings are also essential for achieving exact back focus. If your optical train is just a fraction of a millimeter short of the ideal distance specified by your flattener or reducer, these spacers provide the correction needed for sharp stars across the entire field. The rings can be stacked to create other spacing values, such as 0.8mm (0.3 + 0.5) or 1.8mm (0.3 + 0.5 + 1). The single rings are colour-coded for quick identification: 0.3mm black, 0.5mm red and 1mm gold.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Orientation:\u003c\/strong\u003e Add a ring to rotate your camera to the perfect angle for framing targets like the Andromeda Galaxy (M31) or the Veil Nebula complex.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus Tuning:\u003c\/strong\u003e Bridge small gaps in your spacing to meet the strict back focus tolerance of modern field correctors, eliminating elongated stars at the edge of your frame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessory Alignment:\u003c\/strong\u003e Position filter wheels, off-axis guiders, or rotators so that cables and motors do not interfere with the mount or other equipment.\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 use the M54 Fine-Adjustment Rings to change my camera's orientation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSimply insert a ring (start with the thinnest, 0.3mm) between the two M54-threaded accessories you are connecting. When you tighten them, the accessory will stop at a different rotational position. If it's not the desired angle, try the 0.5mm, 1mm, or a stacked combination until you achieve perfect framing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack M54 Fine-Adjustment Rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The rings are designed to be stacked to create intermediate spacing values. For example, to get 0.8mm of spacing, you can use the 0.3mm and 0.5mm rings together. You can combine all three thicknesses to get 1.8mm of spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill these M54 rings affect my back focus calculation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, and that is one of their primary functions. Each ring adds its specified thickness (0.3mm, 0.5mm, or 1mm) to the total back focus distance of your imaging train. You must account for this additional spacing when calculating your optical path length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould I buy the set or a single ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf you know the exact gap, a single ring is enough: for example, if your flattener requires 55mm and your setup is at 54.5mm, the \u003cstrong\u003e0.5mm ring\u003c\/strong\u003e brings you to the required 55mm. If you are still dialing in back focus or camera orientation, the \u003cstrong\u003eset\u003c\/strong\u003e gives you all three thicknesses (0.3, 0.5 and 1mm) and their stacked combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread pitch for these M54 Fine-Adjustment Rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese rings are designed to work with the standard astronomical \u003cstrong\u003eM54 x 0.75mm\u003c\/strong\u003e thread pitch used on a wide variety of focusers, field flatteners, reducers, and large-format astronomy cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen trying to frame the Horsehead Nebula (B33), my camera is always upside down when tightened. How do the M54 Fine-Adjustment Rings help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese rings are the perfect solution. By inserting one or more rings between your camera and the rest of your imaging train, you change the point at which the threads lock. This allows you to rotate the camera to the correct orientation to properly frame the Horsehead Nebula and Alnitak before fully tightening the connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSet - 0.3\/0.5\/1mm\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFine-Adjustment Spacer Ring Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContents\u003c\/td\u003e\n\u003ctd\u003e3 rings: 0.3mm, 0.5mm, 1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e0.3mm\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFine-Adjustment Spacer Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreads\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75 (Female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack Anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e0.5mm\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eRed \/ Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e1.0mm\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGold Anodized\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Set - 0.3\/0.5\/1mm","offer_id":52913170874653,"sku":"BAA-2457920","price":31.0,"currency_code":"CAD","in_stock":true},{"title":"0.3mm","offer_id":52913170907421,"sku":"BAA-2457921","price":13.0,"currency_code":"CAD","in_stock":true},{"title":"0.5mm","offer_id":52913170940189,"sku":"BAA-2457922","price":12.0,"currency_code":"CAD","in_stock":true},{"title":"1.0mm","offer_id":52913170972957,"sku":"BAA-2457923","price":11.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-M54-Fine-Adjustment-rings-Set-0-3-0-5-1-mm-Aluminium-1_8206d17a-15d3-4456-af82-8d803f3dca37.jpg?v=1789087084","url":"https:\/\/davidastro.com\/fr\/products\/baader-planetarium-m54-fine-adjustment-rings-aluminium","provider":"David Astro","version":"1.0","type":"link"}