Extended Spacer for Metabones Adapters | Multi-Interface L-Bracket & Tripod Riser

The Hejnar Photo Extended Structural Spacer Block is a heavy-duty, highly versatile hardware solution engineered custom-tailored for Metabones (Gen 2, Gen 3, and Gen 4) smart adapters. Designed to install directly between your adapter body and quick-release hardware, this advanced riser block expands vertical height to deliver essential clearance for wide-barrel lenses, large tripod heads, and custom support arrays. Featuring built-in threaded multi-interfaces, it allows you to mount universal camera L-brackets or non-Arca utility plates directly into the spacer framework while providing bidirectional mounting options to drastically improve equipment balance.

Quick Overview & Key Features

• Dedicated Adapter Compatibility: Custom-machined block profile engineered specifically to index perfectly with the base channels of Metabones Gen 2, Gen 3, and Gen 4 lens adapters.
• Critical Height Riser Profile: Adds crucial vertical spacing to prevent large-barrel lenses or bulky camera support hardware from physically striking tripod pan knobs and monopod plates.
• Universal L-Bracket Interface: Features two 1/4-20 tapped holes flanking the central mounting screw to allow direct, secure integration of a Hejnar Photo universal camera L-bracket.
• Non-Arca System Adaptation: Equipped with an additional 1/4-20 tapped hole positioned at the front of the spacer block to securely host proprietary quick-release plates or video adapters.
• Bidirectional Reversible Mounting: Symmetrical structural design can be attached to the Metabones adapter in either direction to fine-tune your center of gravity and optimize overall gear balance.
• Anti-Twist Alignment Channels: Precision-milled geometric seating tracks completely eliminate shifting, twisting, or mechanical play under heavy torque loads.
• Premium US Craftsmanship: Precision CNC-machined from a solid block of high-grade 6061-T6 aircraft aluminum.
• Durable Hard-Coat Finish: Treated with a satin black hard-coat anodized surface layer for advanced resistance against scuffs, scratches, and harsh outdoor field elements.
• Complete Assembly Hardware: Supplied with high-tensile, corrosion-resistant stainless steel mounting screws custom-lengthened to ensure absolute structural safety.

Technical Specifications

• Product Category: Lens Mount Adapter Extended Riser / Multi-Interface Spacer
• Supported Adapter Generations: Metabones Gen 2, Gen 3, and Gen 4
• L-Bracket Mount Interface: Dual 1/4"-20 tapped threads flanking the center channel
• Utility Mount Interface: One (1) front-facing 1/4"-20 tapped thread for non-Arca plates
• Mount Directionality: Bidirectional / Fully Reversible (Front-to-Back or Back-to-Front)
• Material Construction: CNC-Milled 6061-T6 Aircraft Aluminum
• Assembly Hardware: High-tensile stainless steel connection fasteners
• Exterior Finish Layer: Scratch-Resistant Black Hard-Coat Anodization
• Country of Origin: Proudly Made in the USA

Product Description

The premium Hejnar Photo Extended Structural Spacer Block for Metabones solves a frustrating and persistent clearance design bottleneck commonly encountered by landscape, wildlife, video, and astrophotographers deploying adapted lens trains. The factory foot layout on original Metabones adapters sits exceptionally close to the primary lens axis. Consequently, when trying to lock your camera system onto wide tripod platforms, large monopod tilt-heads, or universal Arca-Swiss quick-release receiver clamps, the bulky barrel of fast-aperture lenses or the horizontal rail of a camera L-bracket will physically bottom out against the support hardware. This prevents a clean lock, jams the plate slider slots, and puts dangerous leverage strain on your lens mount.

This extended spacer block provides a highly customizable mechanical fix. Installed directly beneath your adapter body, it provides the precise vertical lift required to let wide optics clear your primary tripod mounts cleanly. Beyond functioning as a standard riser, this advanced variant features expanded utility threading. Each side of the primary mounting screw channel is equipped with a dedicated 1/4-20 tapped hole designed explicitly to accept a Hejnar Photo universal L-bracket, letting you transition into a solid right-angle configuration without stacking multiple unstable adapters. If you operate within a non-Arca ecosystem, an additional 1/4-20 tapped thread is positioned seamlessly at the front face of the spacer block, providing a secure, flush anchor track for custom video plates or proprietary tripod adapters.

To maximize field versatility, this spacer is engineered for completely bidirectional installation. Based on your lens weight and battery-grip configuration, you can flip and attach the spacer block facing forward or backward. This allows you to slide your system's neutral center of gravity perfectly over the center axis of your ball head, eliminating front-heavy nose-diving and restricting micro-vibrations for ultra-sharp results. Bespoke-crafted in the USA from ultra-strong aircraft aluminum and finished with a rugged hard coat, this multi-interface spacer block delivers the structural precision, safety margin, and lifelong reliability your camera rig requires.