{"product_id":"orion-optics-uk-eris-adaptor-plate-225mm-diameter-tubes","title":"Orion Optics UK Adaptor Plate for 225mm Diameter Tubes \u0026 Eris 2″ Rack \u0026 Pinion Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Orion Optics UK Eris 2″ focusers to 225mm diameter tubes\u003c\/li\u003e\n\u003cli\u003eAdds only 11mm of height at the central axis\u003c\/li\u003e\n\u003cli\u003eAllows for 360° focuser rotation for optimal camera framing\u003c\/li\u003e\n\u003cli\u003eFeatures 8 independent screws for precise tilt adjustment and collimation\u003c\/li\u003e\n\u003cli\u003eSecure 4-screw mounting pattern on a 53mm radius\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\u003eAdaptor Plate for 225mm Diameter Tubes \u0026amp; Eris 2″ Rack \u0026amp; Pinion Focuser\u003c\/h2\u003e\n\u003cp\u003eThis adaptor plate securely mates an Orion Optics UK Eris 2″ rack and pinion focuser to optical tubes with a 225mm diameter, adding only 11mm of height to the optical train. It features four mounting screws for the focuser on a 53mm radius and eight additional screws for precise tilt adjustment, ensuring perfect 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\u003eSecure Mounting for the Eris 2\" Focuser on 225mm Tubes\u003c\/h3\u003e\n\u003cp\u003eThis plate provides a solid, purpose-built connection between the high-precision Eris 2\" focuser and telescope tubes with a 225mm diameter. The four focuser mounting holes, arranged on a 53mm radius, ensure a rigid fit that prevents flexure. By slightly loosening these screws, you can rotate the entire focuser assembly 360° to achieve the most comfortable viewing angle or optimal camera orientation.\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\u003eFine-Tune Collimation with 8 Integrated Tilt-Adjustment Screws\u003c\/h3\u003e\n\u003cp\u003eAchieving a perfectly flat imaging field requires the focuser to be perfectly square to the optical axis. This adaptor plate integrates a ring of eight small adjustment screws that allow you to precisely tilt the focuser, correcting for any misalignment in the optical train. To use the tilt function, simply loosen the main tube fixing screws slightly, make your adjustments, and then re-tighten everything for a perfectly collimated setup.\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\"\u003eWhat is the purpose of the Eris 2\" Focuser Adaptor Plate for 225mm tubes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis plate allows you to physically mount the high-precision Eris 2\" rack and pinion focuser onto telescope tubes that have a 225mm outer diameter. It provides a secure, adjustable connection that is critical for both visual observation and astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the tilt-adjustment screws on the Eris 225mm plate help with imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eight tilt-adjustment screws let you precisely square the focuser drawtube to the telescope's optical axis. This is essential for astrophotography to ensure sharp, round stars across the entire field of view, eliminating elongated stars in the corners of your images that are caused by sensor tilt.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI've installed the Eris 225mm adaptor plate, but the tilt screws don't seem to work. What's wrong?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor the tilt adjustment to function correctly, you must first slightly loosen the main screws that fix the plate to the telescope tube itself. This provides the necessary clearance for the small tilt screws to make fine adjustments. Once your collimation is perfect, re-tighten the main fixing screws to lock it in place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I rotate the focuser after installing it with the 225mm Eris adaptor plate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. By slightly slackening the four screws that hold the Eris focuser to the plate, you can rotate the entire focuser body around its central axis. This is extremely useful for positioning your camera or eyepiece at the most comfortable or effective angle for your setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much height does the Eris 225mm adaptor plate add to the optical train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe plate adds 11mm of height at its central axis. You must account for this distance when measuring and calculating your total back focus requirements for flatteners, reducers, or other imaging accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the mounting pattern for the Eris focuser on this 225mm adapter plate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe plate features four mounting holes for the focuser, located on a 53mm radius and spaced 90 degrees apart from each other.\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\u003eCompatible Focuser\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK Eris 2″ Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Mounting\u003c\/td\u003e\n\u003ctd\u003e4 x screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hole Pattern\u003c\/td\u003e\n\u003ctd\u003e53mm radius, 4 holes @ 90 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTilt Adjustment\u003c\/td\u003e\n\u003ctd\u003e8 x screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Height\u003c\/td\u003e\n\u003ctd\u003e11mm (at center axis)\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\"\u003eAdaptor Plate for Eris 2\" Focuser to 225mm Tube\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\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942539620637,"sku":"OOUK-ERIS-ADAPTOR-PLATE-225MM-DIAMETER","price":272.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-Adaptor-plate-for-225mm-diameter-tubes-Eris-2-rack-pinion-1_299ccfb6-a924-4511-aae2-18ab998118ad.jpg?v=1789607855","url":"https:\/\/davidastro.com\/fr\/products\/orion-optics-uk-eris-adaptor-plate-225mm-diameter-tubes","provider":"David Astro","version":"1.0","type":"link"}