{"product_id":"sigma-300-600mm-f4-sports-arca-foot-sigfr001","title":"Sigma 300-600mm F\/4.0 DG OS Sports Arca-Type Foot","description":"\u003c!-- ===================== GRAY BANNER ===================== --\u003e\n\u003cdiv style=\"background:#e5e5e5;padding:12px 15px;margin-bottom:18px;\"\u003e\n\t\u003cstrong\u003eHejnar Photo – SIGFR-001 Arca-Swiss Replacement Foot for Sigma 300-600mm F\/4.0 DG OS Sports\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003eSigma 300-600mm F\/4.0 DG OS Sports Arca-Type Foot\u003c\/h1\u003e\n\u003cp\u003e\nThe Hejnar Photo SIGFR-001 is a precision-engineered Arca-Swiss compatible replacement foot designed specifically for the Sigma 300-600mm F\/4.0 DG OS Sports lens. This upgrade provides a rock-solid Arca-type dovetail for professional tripod mounting and features a double-dovetail profile for maximum mounting flexibility and stability during wildlife and sports photography.\n\u003c\/p\u003e\n\u003chr\u003e\n\n\u003c!-- ===================== QUICK OVERVIEW ===================== --\u003e\n\u003ch2\u003eQuick Overview\u003c\/h2\u003e\n\u003cul\u003e\n\t\u003cli\u003eModel: SIGFR-001\u003c\/li\u003e\n\t\u003cli\u003eDirect replacement specifically for the Sigma 300-600mm F\/4.0 DG OS Sports Lens\u003c\/li\u003e\n\t\u003cli\u003eDouble-Dovetail Profile: Allows for dual clamping surfaces and secondary accessory mounting\u003c\/li\u003e\n\t\u003cli\u003eDual QD Sockets: Integrated stainless steel Quick Detach sockets for secure strap mounting\u003c\/li\u003e\n\t\u003cli\u003eErgonomic Design: Ample finger clearance for focus ring access and supports hood reversal for storage\u003c\/li\u003e\n\t\u003cli\u003ePrecision C.N.C. machined from 6061-T6 Aluminum\u003c\/li\u003e\n\t\u003cli\u003eBlack anodized surface for a professional, durable finish\u003c\/li\u003e\n\t\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003e\nUpgrade your Sigma 300-600mm F\/4.0 Sports lens with a replacement foot built for the field. The SIGFR-001 provides a native Arca-Swiss foundation, eliminating the need for universal adapter plates and reducing potential flex. Its double-dovetail design ensures universal compatibility with Arca-style clamps from RRS, Kirk, Acratech, and Wimberley, allowing you to mount the foot into a head while simultaneously attaching flash brackets or rails to the upper dovetail.\n\u003c\/p\u003e\n\u003cp\u003e\n\u003cstrong\u003eIntegrated QD Carrying Security:\u003c\/strong\u003e This foot features two built-in stainless steel QD sockets, providing the safest carrying method available for your super-telephoto gear. The QD system—trusted for decades by NASA, law enforcement, and military agencies—uses a secure push-button mechanism that inhibits accidental removal. This is the ideal solution for photographers who carry their camera and lens via professional shoulder slings like the Black Rapid system.\n\u003c\/p\u003e\n\n\u003c!-- ===================== INSTALLATION INSTRUCTIONS ===================== --\u003e\n\u003ch2\u003eSimple Installation\u003c\/h2\u003e\n\u003col\u003e\n\t\u003cli\u003eUse the included M3 hex key to completely remove the four factory Sigma mounting screws.\u003c\/li\u003e\n\t\u003cli\u003ePosition the SIGFR-001 foot and secure it to the lens collar using the original Sigma screws.\u003c\/li\u003e\n\t\u003cli\u003e\u003cem\u003ePro Tip: If your mounting screws tend to loosen over time, consider using a drop of Loctite 242 (blue) for added security.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003c!-- ===================== SPECIFICATIONS ===================== --\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLens Compatibility:\u003c\/strong\u003e Sigma 300-600mm F\/4.0 DG OS Sports\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061-T6 Aluminum\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Anodized Coat\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Double-Dovetail Arca-Type\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e SIGFR-001 Foot and M3 hex key\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701622734953,"sku":"SIGFR-001-SIG3","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/SIGFR-001-2.jpg?v=1792111656","url":"https:\/\/www.hejnarphotostore.com\/products\/sigma-300-600mm-f4-sports-arca-foot-sigfr001","provider":"Hejnar Photo","version":"1.0","type":"link"}