{"product_id":"baader-planetarium-1-25-inch-nosepiece-to-t-2a-with-safety-kerf","title":"Baader Planetarium 1.25\" Nosepiece to T-2a – with Safety-Kerf","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects T-2 accessories to a 1.25\" focuser or visual back\u003c\/li\u003e\n\u003cli\u003eModern 3mm T-2 thread depth for cameras with short optical height\u003c\/li\u003e\n\u003cli\u003eSafety-Kerf groove prevents slippage and secures equipment\u003c\/li\u003e\n\u003cli\u003ePrecision-machined for a solid, centered connection\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\u003eBaader Planetarium 1.25\" Nosepiece to T-2a – with Safety-Kerf\u003c\/h2\u003e\n\u003cp\u003eThis Baader Planetarium 1.25\" Nosepiece to T-2a adapter solves a critical compatibility issue for modern astro-cameras by incorporating a shallow 3mm male T-2 thread. This updated design replaces the older 5mm standard, preventing the internal components of cameras with minimal back focus from contacting the adapter's threads. The addition of a \"Safety-Kerf\" groove provides a secure, worry-free connection to any 1.25\" focuser or accessory holder.\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 3mm T-2 Thread: A Modern Solution for Short Back Focus\u003c\/h3\u003e\n\u003cp\u003eMany modern planetary and guide cameras feature extremely short optical heights to maximize back-focus flexibility. The traditional 5mm thread depth of older T-2 adapters can protrude too far into the camera body, potentially bottoming out against filter wheels, sensor windows, or electronics. Baader's 3mm T-2 thread standard eliminates this risk entirely, ensuring your camera can be threaded on fully and securely without any internal contact or 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\u003eSafety-Kerf Groove: A Secure Fit for 1.25\" Focusers\u003c\/h3\u003e\n\u003cp\u003eThe barrel of the 1.25\" nosepiece features a machined undercut, which Baader calls a Safety-Kerf. This groove provides a positive stop for your focuser's set screw. Even if the screw loosens slightly, the tip will catch in the kerf, preventing the nosepiece—and your expensive camera—from accidentally slipping out of the focuser and falling.\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 3mm T-2 thread on this Baader nosepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e3mm T-2 thread\u003c\/strong\u003e is specifically designed for modern astronomy cameras that have a very short optical height or back focus. Older adapters with 5mm deep threads can bottom out against internal camera components, but the shorter 3mm thread on this Baader nosepiece ensures a secure connection without interference.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Safety-Kerf on the 1.25\" Nosepiece to T-2a work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSafety-Kerf\u003c\/strong\u003e is a machined groove around the 1.25\" barrel. When you insert the nosepiece into a focuser, the tip of the locking set screw engages with this groove. This acts as a physical stop, preventing your camera and the nosepiece from slipping out even if the set screw becomes slightly loose during an imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Baader T-2 nosepiece work with my ZWO ASI camera that has short back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this adapter is an ideal choice for cameras like those from ZWO, QHY, and other manufacturers that feature short back focus distances. The 3mm thread depth is specifically intended to solve the compatibility problems these cameras can have with older, deeper-threaded T-2 accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Baader 1.25\" nosepiece improve security in my Celestron 8\" SCT's visual back?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen used in the 1.25\" visual back of a Celestron 8\" SCT or similar telescope, the Safety-Kerf provides a significant security upgrade. The focuser's set screw will lock into the groove, creating a much more robust connection than a simple friction fit on a smooth barrel. This reduces the risk of your imaging train slipping as the telescope slews across the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose this Baader nosepiece over a standard one without a safety kerf?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose this Baader nosepiece for peace of mind. While a standard nosepiece relies purely on the friction from a set screw, the Safety-Kerf provides a mechanical fail-safe. It's a small but critical feature that protects your valuable camera or accessories from an accidental drop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader 1.25\" Nosepiece to T-2a compatible with older T-2 accessories?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is fully compatible. The T-2 thread (M42x0.75) is a universal standard. This adapter will thread into any T-2 female port, whether it's on a new camera, an older filter wheel, or an off-axis guider. The only difference is the shorter, safer thread engagement depth.\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\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003e1.25\" Nosepiece to T-2 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side\u003c\/td\u003e\n\u003ctd\u003e1.25\" Barrel with Safety-Kerf\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Side\u003c\/td\u003e\n\u003ctd\u003eT-2 (M42x0.75) Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Length\u003c\/td\u003e\n\u003ctd\u003e3 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\"\u003e1.25\" Nosepiece to T-2a – with Safety-Kerf\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\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913177657629,"sku":"BAA-2458106","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-1-Nosepiece-to-T-2a-with-Safety-Kerf-1_2703ea75-1a1e-4d42-929d-a1c75a1cf6a3.jpg?v=1789087291","url":"https:\/\/davidastro.com\/fr-us\/products\/baader-planetarium-1-25-inch-nosepiece-to-t-2a-with-safety-kerf","provider":"David Astro","version":"1.0","type":"link"}