{"product_id":"phase-one-mamiya-645df-large-lens-rail-arca-swiss","title":"Phase One \/ Mamiya 645DF+ Arca-Swiss Compatible Large Lens Rail","description":"\u003c!-- ===================== GRAY HEADER BANNER ===================== --\u003e \n\u003cdiv style=\"background:#f4f4f4; border-left:4px solid #333; padding:15px; margin-bottom:25px; font-family:Arial, sans-serif;\"\u003e \n    \u003cstrong style=\"font-size:18px; color:#222;\"\u003eHejnar Photo – Phase One\/Mamiya 645DF+ Large Lens Rail\u003c\/strong\u003e \n\u003c\/div\u003e \n\n\u003c!-- ===================== H1 PRODUCT TITLE ===================== --\u003e\n\u003ch1 style=\"font-family:Arial, sans-serif; font-size:24px; color:#111; margin-bottom:20px; line-height:1.3;\"\u003ePhase One \/ Mamiya 645DF+ Arca-Swiss Compatible Large Lens Rail\u003c\/h1\u003e\n\n\u003c!-- ===================== INTRODUCTORY OVERVIEW ===================== --\u003e \n\u003cdiv style=\"font-family:Arial, sans-serif; line-height:1.6; color:#333; margin-bottom:25px;\"\u003e\n    \u003cp style=\"font-size:15px;\"\u003eThe \u003cstrong\u003eHejnar Photo Phase One\/Mamiya 645DF+ Large Lens Rail\u003c\/strong\u003e is a precision-engineered stabilization solution designed to provide optimal support and balance for medium format systems. Specifically developed for the 645DF+ body when paired with larger optics, teleconverters, or extension rings, this rail ensures your focal plane remains static under heavy loads. Proudly CNC-machined in the USA from solid aircraft-grade aluminum, it offers the structural rigidity required for high-resolution digital back photography.\u003c\/p\u003e \n\u003c\/div\u003e\n\n\u003chr style=\"border:0; border-top:1px solid #ddd; margin:25px 0;\"\u003e \n\n\u003c!-- ===================== SAE TECHNICAL SPECIFICATIONS ===================== --\u003e \n\u003cdiv style=\"font-family:Arial, sans-serif; margin-bottom:25px;\"\u003e\n    \u003ch2 style=\"font-size:20px; color:#111; margin-bottom:15px; border-bottom:1px solid #ccc; padding-bottom:5px;\"\u003eSAE Technical Specifications\u003c\/h2\u003e \n    \u003cul style=\"padding-left:20px; line-height:1.8; font-size:14px;\"\u003e \n        \u003cli\u003e\n\u003cstrong\u003eSystem Compatibility:\u003c\/strong\u003e Phase One \/ Mamiya 645DF+ Camera Body.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eDovetail Standard:\u003c\/strong\u003e Integrated Arca-Swiss compatible profile.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eOptic Optimization:\u003c\/strong\u003e Specifically designed for Schneider Kreuznach 2x Teleconverter \u0026amp; 240mm LS combinations.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eAccessory Support:\u003c\/strong\u003e Compatible with 2x Teleconverters and Extension tubes across multiple lens lengths.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Precision CNC-machined 6061-T6 Aircraft-Grade Aluminum.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Durable black hard-coat anodized surface.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e Designed and manufactured in the USA.\u003c\/li\u003e \n    \u003c\/ul\u003e \n\u003c\/div\u003e\n\n\u003chr style=\"border:0; border-top:1px solid #ddd; margin:25px 0;\"\u003e \n\n\u003c!-- ===================== KEY FEATURES SECTION ===================== --\u003e \n\u003cdiv style=\"font-family:Arial, sans-serif; margin-bottom:25px;\"\u003e\n    \u003ch2 style=\"font-size:20px; color:#111; margin-bottom:15px; border-bottom:1px solid #ccc; padding-bottom:5px;\"\u003eQuick Overview \u0026amp; Key Features\u003c\/h2\u003e \n    \u003cul style=\"padding-left:20px; line-height:1.8; font-size:14px;\"\u003e \n        \u003cli\u003e\n\u003cstrong\u003eEnhanced Balance \u0026amp; Stability:\u003c\/strong\u003e Eliminates the front-heavy cantilever effect when using massive lenses, ensuring a perfect center of gravity on your tripod head.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eModular Integration:\u003c\/strong\u003e Functions flawlessly in combination with the Phase One\/Mamiya L-bracket and Arca-Swiss type quick-connect tripod heads.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003ePrecision Clearance:\u003c\/strong\u003e Tailored geometry provides necessary clearance for Schneider Kreuznach 2x Teleconverters without compromising rail rigidity.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eDouble-Dovetail Profile:\u003c\/strong\u003e Allows for mounting flash brackets or secondary macro accessories on top of the rail assembly.\u003c\/li\u003e \n        \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Interfaces directly with industry-standard clamps from Really Right Stuff (RRS), Kirk, Wimberley, and Markins.\u003c\/li\u003e \n    \u003c\/ul\u003e \n\u003c\/div\u003e\n\n\u003chr style=\"border:0; border-top:1px solid #ddd; margin:25px 0;\"\u003e \n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e \n\u003cdiv style=\"font-family:Arial, sans-serif; line-height:1.6; color:#333;\"\u003e\n    \u003ch2 style=\"font-size:20px; color:#111; margin-bottom:15px; border-bottom:1px solid #ccc; padding-bottom:5px;\"\u003eDetailed Product Description\u003c\/h2\u003e \n    \u003cp style=\"font-size:14px; margin-bottom:15px;\"\u003eThe Hejnar Photo Phase One\/Mamiya 645DF+ Large Lens Rail addresses a critical stability challenge for medium format photographers. When using heavy prime lenses like the 240mm LS—especially when extended by a Schneider Kreuznach 2x Teleconverter—the weight distribution shifts dramatically forward. This rail acts as a structural extension, distributing the load across the Arca-Swiss dovetail and preventing the vibration or \"creep\" that can compromise high-resolution captures.\u003c\/p\u003e \n    \n    \u003cp style=\"font-size:14px; margin-bottom:15px;\"\u003eThis system is designed to be a component of a larger modular ecosystem. When used in conjunction with a dedicated L-bracket, the rail allows for the perfect nodal and weight balance of the camera\/lens combination, even in vertical orientations. This is particularly advantageous for architectural and studio product photographers who require absolute geometric precision.\u003c\/p\u003e \n    \n    \u003cp style=\"font-size:14px;\"\u003eMachined from solid aircraft alloy and finished with a durable hard-coat anodize, this USA-crafted rail outperforms mass-produced alternatives in structural integrity. It provides the unyielding physical foundation required to unlock the absolute resolution limits of Phase One digital backs and Schneider optics.\u003c\/p\u003e \n\u003c\/div\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701621260393,"sku":"Phase-One-Support","price":280.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/Phase-One-Support-2.jpg?v=1792111615","url":"https:\/\/www.hejnarphotostore.com\/products\/phase-one-mamiya-645df-large-lens-rail-arca-swiss","provider":"Hejnar Photo","version":"1.0","type":"link"}