{"product_id":"tele-vue-flat-top-adapter-2-inch-1-25-inch","title":"Tele Vue Flat top Adapter - 2\" - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapter Type: 2\" to 1.25\" Reducer\u003c\/li\u003e\n\u003cli\u003eProfile: Flat Top (Low Profile)\u003c\/li\u003e\n\u003cli\u003eLocking Mechanism: Brass Clamp Ring\u003c\/li\u003e\n\u003cli\u003eCompatibility: 2\" Focusers and Diagonals\u003c\/li\u003e\n\u003cli\u003eEyepiece Format: 1.25\"\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\u003eSecure Your View, Preserve Your Gear with the Tele Vue Flat Top Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Flat Top Adapter is a precision 2\" to 1.25\" reducer engineered to provide a secure, non-marring connection while maximizing the in-travel of your telescope's focuser. It addresses a critical need for observers who use a mix of eyepiece formats or struggle to reach focus with specific optical trains. This adapter is built not just to hold an eyepiece, but to protect it while ensuring perfect alignment with the optical axis.\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 Low Profile \"Flat Top\" Advantage\u003c\/h3\u003e\n\u003cp\u003eMany standard adapters add significant length to the optical path, consuming precious focuser in-travel. The Tele Vue Flat Top Adapter is designed with a minimal profile, sitting nearly flush and consuming less back focus than taller \"high-hat\" style adapters. This design can be the difference between achieving a sharp focus and not, especially in Newtonians with limited travel or when using certain reducers and accessories.\u003c\/p\u003e\n\u003cp\u003eFor observers who frequently switch between 2\" and 1.25\" eyepieces, this adapter often allows the 1.25\" eyepieces to reach focus without needing to move the focuser drawtube significantly. This maintains a more consistent balance point and simplifies your observing workflow, keeping you at the eyepiece instead of adjusting hardware.\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\u003eProtect Your Eyepieces with a Brass Clamp Ring\u003c\/h3\u003e\n\u003cp\u003eA common frustration with simple adapters is the single thumbscrew that digs directly into the eyepiece barrel, leaving unsightly and potentially damaging score marks. Tele Vue solves this problem with an integrated brass clamp ring. When you tighten the thumbscrew, it compresses this soft metal ring, which then distributes the pressure evenly around the eyepiece barrel.\u003c\/p\u003e\n\u003cp\u003eThis mechanism provides a more secure, concentric grip than a direct screw, preventing your valuable eyepieces from tilting or wobbling in the focuser. More importantly, it ensures the chrome or anodized barrels of your eyepieces remain in pristine condition, preserving their value and ensuring a smooth fit every time you use them.\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\u003eSimple, Secure Thumbscrew Lock\u003c\/h3\u003e\n\u003cp\u003eThe adapter features a single, robust thumbscrew that is easy to operate even with gloves on during cold nights. The action is smooth and provides excellent tactile feedback, so you know exactly when the eyepiece is secure without over-tightening. This simple, reliable design is a hallmark of Tele Vue's approach: focus on the core function and execute it perfectly for years of trouble-free use.\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 Ideal 2\" to 1.25\" Conversion\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the essential link for using your 1.25\" Plössls, Delos, or Naglers in a 2\" diagonal or focuser. It maintains the precise optical alignment required for high-magnification planetary viewing and ensures your wide-field eyepieces are perfectly centered. The interior is blackened to reduce internal reflections, helping to preserve the high-contrast views your Tele Vue eyepieces are designed to deliver.\u003c\/p\u003e\n\u003cp\u003eOne trade-off of the low-profile design is that it can be slightly more difficult to grasp and remove from a tight focuser compared to taller adapters. However, for most users, the benefit of increased in-travel and a secure, non-marring grip far outweighs this minor handling consideration.\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\u003eChoosing the Right Tele Vue Adapter\u003c\/h3\u003e\n\u003cp\u003eTele Vue offers several 2\" to 1.25\" adapters, and choosing the right one depends on your specific needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Top Adapter (ACF-2125):\u003c\/strong\u003e This is the best choice when focuser in-travel is limited, or you need the lowest possible profile. It is the go-to for many Newtonian owners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Hat Adapter (BEC-0005 \"Equalizer\"):\u003c\/strong\u003e This adapter is parfocal with Tele Vue's 2\" eyepieces. If you switch between 2\" and 1.25\" Tele Vue eyepieces and want to minimize refocusing, the High-Hat is the better option, assuming you have sufficient focuser travel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor most general-purpose applications where back focus is a concern, the Flat Top adapter provides the most versatile and secure solution.\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\"\u003eWhen do I need a flat top adapter instead of a high-hat?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the flat top adapter when your telescope has limited focuser in-travel and you struggle to reach focus, especially with certain eyepieces or accessories. It consumes the least amount of back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter scratch my eyepiece barrels?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. It uses a brass clamp ring that tightens concentrically around the eyepiece barrel. This prevents the set screw from digging into the barrel, protecting your eyepieces from score marks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this adapter threaded for 2\" filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Tele Vue Flat Top Adapter is not threaded to accept 2\" (48mm) filters on its barrel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter make my 1.25\" eyepieces parfocal with my 2\" Tele Vue eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it will not. For that capability, you need the Tele Vue \"Equalizer\" Hi-Hat Adapter (BEC-0005), which is specifically designed to make most 1.25\" Tele Vue eyepieces nearly parfocal with their 2\" counterparts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter with non-Tele Vue eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this adapter will work perfectly with any standard 1.25\" eyepiece, filter, or accessory, regardless of the brand.\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\u003eProduct Number\u003c\/td\u003e\n\u003ctd\u003eACF-2125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eReducer Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side\u003c\/td\u003e\n\u003ctd\u003e2\" Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Side\u003c\/td\u003e\n\u003ctd\u003e1.25\" Receptacle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocking Mechanism\u003c\/td\u003e\n\u003ctd\u003eBrass Compression Ring with Thumbscrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eLow (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAnodized Aluminum Body, Brass Ring\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\"\u003eTele Vue Flat Top Adapter - 2\" to 1.25\"\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\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223880368413,"sku":"TV-ACF-2125","price":62.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Flat_Top_Adapter_1.jpg?v=1777515022","url":"https:\/\/davidastro.com\/en-int\/products\/tele-vue-flat-top-adapter-2-inch-1-25-inch","provider":"David Astro","version":"1.0","type":"link"}