{"product_id":"4-inch-arca-swiss-clamp-long-black-knob-45mm","title":"4.00\" Arca-Swiss Compatible Quick Release Clamp | Long Black Knob","description":"\u003c!-- ===================== GRAY BANNER ===================== --\u003e\n\u003cdiv style=\"background:#e5e5e5;padding:12px 15px;margin-bottom:18px;\"\u003e\n    \u003cstrong\u003e4.00 Inch Arca-Swiss Compatible Quick Release Clamp | Long Black Knob \u0026amp; 45mm Spaced Mounts\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003e4.00\" Arca-Swiss Compatible Quick Release Clamp | Long Black Knob\u003c\/h1\u003e\n\u003cp\u003e\n    The 4.00-inch jaw length \u003cstrong\u003eArca-Swiss compatible clamp\u003c\/strong\u003e is a professional-grade mounting solution designed for photographers requiring maximum leverage and security. Featuring a high-grip \u003cstrong\u003elong black knob\u003c\/strong\u003e and a versatile mounting interface, this clamp provides an unyielding connection for telephoto lenses, macro rails, and custom modular camera rigs.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003c!-- ===================== QUICK OVERVIEW ===================== --\u003e\n\u003ch2\u003eKey Features \u0026amp; Quick Overview\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eExtended 4.00\" Jaws:\u003c\/strong\u003e Offers a massive surface area for superior grip and stability when using professional Arca-type plates and long rails.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Leverage Long Black Knob:\u003c\/strong\u003e The captive knob design ensures it cannot be lost in the field and stops at maximum opening for fast gear transitions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Dual Mounts:\u003c\/strong\u003e Includes two outside 1\/4-20 tapped holes spaced exactly 45mm apart, ideal for specialized multi-point attachments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile Center Mounting:\u003c\/strong\u003e Center socket is countersunk on top for 1\/4-20 or M6 screws and natively threaded for 3\/8-16 tripod studs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Relief Grooves:\u003c\/strong\u003e Integrated 2.6mm deep relief grooves prevent gear \"free fall\" by catching safety stops on Arca-type plates if the clamp is partially open.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Integration:\u003c\/strong\u003e The rear side features a dedicated alignment groove to match professional ball head connections, preventing unwanted rotation during use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eProfessional Arca-Type Mounting for Technical Photography\u003c\/h2\u003e\n\u003cp\u003e\n    Engineered for precision workflows, this \u003cstrong\u003e4-inch Arca-Swiss style clamp\u003c\/strong\u003e is CNC machined from solid aircraft-grade 6061-T6 aluminum. The long black knob provides extra torque, making it easy to secure heavy equipment with minimal effort. This \"Micro-Vise\" design ensures a rock-solid, twist-free connection compatible with plates from RRS, Kirk, Wimberley, and Markins.\n\u003c\/p\u003e\n\u003cp\u003e\n    \u003cstrong\u003eSafety and Field Reliability:\u003c\/strong\u003e This clamp is built for the rigors of outdoor and studio environments. The safety relief grooves serve as a critical fail-safe against accidental drops, while the hard-coat black anodized finish provides exceptional wear resistance. Whether you are shooting architectural panoramas or balancing a long lens, this clamp delivers the reliability demanded by professional photographers.\n\u003c\/p\u003e\n\n\u003c!-- ===================== SPECIFICATIONS ===================== --\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJaw Length:\u003c\/strong\u003e 4.00 Inches (101.6mm)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKnob Type:\u003c\/strong\u003e Long Black (Captive Design)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMounting Holes:\u003c\/strong\u003e Two 1\/4-20 tapped holes (45mm spacing)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCenter Threading:\u003c\/strong\u003e Threaded 3\/8-16 and countersunk for M6\/1\/4-20\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRelief Groove Depth:\u003c\/strong\u003e 2.6mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC Machined 6061-T6 Aluminum\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Hard-Coat Anodized\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701597929577,"sku":"F64b","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/F64b-2.jpg?v=1792110994","url":"https:\/\/www.hejnarphotostore.com\/products\/4-inch-arca-swiss-clamp-long-black-knob-45mm","provider":"Hejnar Photo","version":"1.0","type":"link"}