{"title":"Clamps 4.00 inch","description":"\u003cp\u003ePrecision-engineered Arca-Swiss compatible clamps in the 4.00\" to 4.8\" size range. Handmade for photographers who demand accuracy and reliability.\u003c\/p\u003e","products":[{"product_id":"400-inch-arca-swiss-compatible-clamp-long-silver-k","title":"4.00\" Arca-Swiss Compatible Quick Release Clamp | 45mm Spaced Mounts","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 | 45mm Spaced 1\/4-20 Holes\u003c\/strong\u003e \n\u003c\/div\u003e \n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e \n\u003ch1\u003e4.00\" Arca-Swiss Compatible Quick Release Clamp | 45mm Spaced Mounts\u003c\/h1\u003e \n\u003cp\u003e\n    The 4.00-inch jaw length \u003cstrong\u003eArca-Swiss compatible clamp\u003c\/strong\u003e is a precision-engineered mounting solution designed for photographers who require absolute security for telephoto lenses and modular camera rigs. Featuring a high-force \u003cstrong\u003elong silver knob\u003c\/strong\u003e and a versatile mounting interface, this clamp delivers superior stability and flexibility for high-end tripod and monopod systems.\n\u003c\/p\u003e \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 Provides an expansive surface area for maximum contact and grip with professional Arca-type plates and rails.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003eVersatile Mounting Interface:\u003c\/strong\u003e Center socket is countersunk on top for 1\/4-20 or M6 screws and is also natively threaded for 3\/8-16 studs.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003ePrecision Dual Mounts:\u003c\/strong\u003e Two outside holes are tapped 1\/4-20 and spaced exactly 45mm apart for specialized multi-point attachments.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003eSafety Relief Grooves:\u003c\/strong\u003e 2.6mm deep relief grooves ensure compatibility with Arca-type plates featuring safety stops, preventing gear \"free fall\" if the clamp is partially open.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003eTongue-in-Pocket Design:\u003c\/strong\u003e Internal mechanism protects moving parts from dust and grit while keeping the jaws perfectly aligned to eliminate unwanted bending forces.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003eCaptive Silver Knob:\u003c\/strong\u003e High-leverage long silver knob is captive and stops at maximum opening, ensuring it cannot be lost in the field.\u003c\/li\u003e \n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Integration:\u003c\/strong\u003e The back side features a dedicated groove to match professional ball head connections and prevent rotation during use.\u003c\/li\u003e \n\u003c\/ul\u003e \n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e \n\u003ch2\u003eProfessional Arca-Type Quick Release Solution\u003c\/h2\u003e \n\u003cp\u003e \n    Upgrade your camera support gear with a \u003cstrong\u003eprofessional Arca-Swiss clamp\u003c\/strong\u003e built for the most demanding technical environments. Precision CNC machined from aircraft-grade 6061-T6 aluminum, this 4.00-inch clamp offers the rock-solid connection required for long-lens shooting and macro setups. Its \"Micro-Vise\" design ensures a tenacious, twist-free grip on any compatible plate from major brands like RRS, Kirk, Wimberley, and Markins. \n\u003c\/p\u003e \n\u003cp\u003e \n    \u003cstrong\u003eAdvanced Safety and Field Reliability:\u003c\/strong\u003e This clamp is engineered for total system interoperability and maximum field reliability. The integrated 2.6mm deep safety relief grooves serve as a critical fail-safe against accidental gear drops, while the captive hardware ensures you are never stranded on a location shoot due to a missing knob. Finished in a durable black hard-coat anodize, this high-performance clamp is built to provide years of professional service.\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\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\u003eKnob Type:\u003c\/strong\u003e Long Silver (Captive Design)\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":67701597798505,"sku":"F64","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/F64-2.jpg?v=1792110989"},{"product_id":"4-inch-arca-swiss-clamp-short-silver-knob-45mm","title":"4.00\" Arca-Swiss Compatible Quick Release Clamp | Short Silver 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 | Short Silver Knob \u0026amp; 45mm Spacing\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003e4.00\" Arca-Swiss Compatible Quick Release Clamp | Short Silver Knob\u003c\/h1\u003e\n\u003cp\u003e\n    The 4.00-inch jaw length \u003cstrong\u003eArca-Swiss compatible clamp\u003c\/strong\u003e offers a heavy-duty, precise mounting interface for professional camera rigs and telephoto lenses. Equipped with a compact, high-torque \u003cstrong\u003eshort silver knob\u003c\/strong\u003e, this quick release system delivers maximum holding power and stability without adding unnecessary bulk to your tripod setup.\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\" Jaw Length:\u003c\/strong\u003e Spreads gripping pressure evenly across the rail for an ultra-secure hold on large format gear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShort Silver Knob:\u003c\/strong\u003e Engineered with a captive design that stops at maximum opening so it can never be lost or dropped in the field.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual 45mm Threaded Mounts:\u003c\/strong\u003e Features two outside 1\/4-20 tapped holes spaced exactly 45mm apart for specialized dual-point mounting.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile Center Socket:\u003c\/strong\u003e Countersunk on top for clean screw placement and internally threaded for standard 3\/8-16 studs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFail-Safe Relief Grooves:\u003c\/strong\u003e Machined 2.6mm deep relief grooves accommodate plates with safety stops, preventing gear free fall if the jaw loosens.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Alignment:\u003c\/strong\u003e Rear alignment groove mates perfectly with compatible ball head connections to eliminate unwanted rotational twisting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eHeavy-Duty Camera Support with Anti-Twist Design\u003c\/h2\u003e\n\u003cp\u003e\n    Engineered for precision and built to withstand rigorous field use, this \u003cstrong\u003e4-inch quick release clamp\u003c\/strong\u003e provides seamless interoperability with Arca-type plates and rails. The low-profile short silver knob ensures swift locking transitions while keeping the overall footprint streamlined. \n\u003c\/p\u003e\n\u003cp\u003e\n    The specialized back-side alignment groove secures your connection to modern ball heads, eliminating the shifting or twisting common with heavy lens systems. Combined with built-in safety relief paths, your investment remains fully protected during micro-adjustments or fast-paced shooting scenarios.\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 Configuration:\u003c\/strong\u003e Short Silver (Captive Field-Safe Design)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual Mount Spacing:\u003c\/strong\u003e 45mm Center-to-Center (1\/4-20 Tapped)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCenter Threading:\u003c\/strong\u003e Threaded 3\/8-16 \u0026amp; Countersunk Top\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Groove Depth:\u003c\/strong\u003e 2.6mm Deep Paths\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Feature:\u003c\/strong\u003e Bottom Channel Alignment Groove\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701597831273,"sku":"F64a","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/F64a-2.jpg?v=1792110991"},{"product_id":"4-inch-arca-swiss-clamp-short-black-knob-45mm","title":"4.00\" Arca-Swiss Compatible Quick Release Clamp | Short 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 | Short Black Knob \u0026amp; 45mm Spacing\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003e4.00\" Arca-Swiss Compatible Quick Release Clamp | Short 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 precision-engineered mounting solution designed for photographers who require absolute security and a low-profile aesthetic. Featuring a compact \u003cstrong\u003eshort black knob\u003c\/strong\u003e and a versatile mounting interface, this clamp delivers superior stability for telephoto lenses, macro rails, and 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 Provides an expansive surface area for maximum contact and grip with professional Arca-type plates and rails.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLow-Profile Short Black Knob:\u003c\/strong\u003e Compact design reduces bulk while the captive mechanism ensures the knob cannot be lost in the field.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Dual Mounts:\u003c\/strong\u003e Two outside holes are tapped 1\/4-20 and spaced exactly 45mm apart for specialized multi-point attachments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile Mounting Interface:\u003c\/strong\u003e Center socket is countersunk on top for 1\/4-20 or M6 screws and is also natively threaded for 3\/8-16 studs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Relief Grooves:\u003c\/strong\u003e 2.6mm deep relief grooves ensure compatibility with Arca-type plates featuring safety stops, preventing gear \"free fall\" if the clamp is partially open.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Integration:\u003c\/strong\u003e The back side features a dedicated groove to match professional ball head connections and prevent rotation during use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eProfessional Arca-Type Quick Release Solution\u003c\/h2\u003e\n\u003cp\u003e\n    Upgrade your camera support gear with a \u003cstrong\u003eprofessional Arca-Swiss clamp\u003c\/strong\u003e built for the most demanding technical environments. Precision CNC machined from aircraft-grade 6061-T6 aluminum, this 4.00-inch clamp offers the rock-solid connection required for long-lens shooting and macro setups. Its \"Micro-Vise\" design ensures a tenacious, twist-free grip on any compatible plate from major brands like RRS, Kirk, Wimberley, and Markins.\n\u003c\/p\u003e\n\u003cp\u003e\n    \u003cstrong\u003eAdvanced Safety and Field Reliability:\u003c\/strong\u003e This clamp is engineered for total system interoperability and maximum field reliability. The integrated 2.6mm deep safety relief grooves serve as a critical fail-safe against accidental gear drops, while the captive hardware ensures you are never stranded on a location shoot due to a missing knob. Finished in a durable black hard-coat anodize, this high-performance clamp is built to provide years of professional service.\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\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\u003eKnob Type:\u003c\/strong\u003e Short Black (Captive Design)\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":67701597896809,"sku":"F64ab","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/F64ab-2.jpg?v=1792110992"},{"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/collections\/F64b-2.jpg?v=1792270666","url":"https:\/\/www.hejnarphotostore.com\/collections\/clamps-4-00-4-8-inch.oembed","provider":"Hejnar Photo","version":"1.0","type":"link"}