Sigma 300-600mm F4.0 DG OS Sports Low Profile Arca-Type Foot

The Hejnar Photo SIGFR-003 is a precision-engineered, low-profile Arca-Swiss compatible replacement foot designed specifically for the Sigma 300-600mm F4.0 DG OS lens. This upgrade provides a lower center of gravity for improved stability and handling, while offering a rock-solid Arca-type dovetail with dual integrated stainless steel Quick Detach (QD) sockets for maximum security.

Quick Overview

• Model: SIGFR-003 (Low Profile Version)
• Direct replacement specifically for the Sigma 300-600mm F4.0 DG OS Lens
• Low Profile Design: Enhances lens balance and reduces bulk on tripod and monopod setups
• Dual QD Sockets: Integrated stainless steel Quick Detach sockets for secure strap mounting
• Double-Dovetail Profile: Allows clamping from both the top and bottom surfaces
• Ergonomic Design: Ample clearance for focusing ring access and supports hood reversal for storage
• Precision C.N.C. machined from 6061-T6 Aluminum
• Black anodized surface for a professional, durable finish
• Made in the USA

Product Description

Upgrade your Sigma super-telephoto workflow with a replacement foot built for precision and stability. The SIGFR-003 provides a native Arca-Swiss foundation, eliminating the need for bulky adapter plates. Its low-profile design brings the lens closer to the center of rotation on gimbal heads, resulting in smoother movements and easier handling in the field.

Advanced Carrying & Mounting: This foot features a double-dovetail design, allowing you to mount the foot into a head while simultaneously attaching rails or flash brackets to the upper surface. For carrying security, the integrated dual stainless steel QD sockets offer a fail-safe connection for professional straps. The QD system—trusted for decades by NASA, law enforcement, and military agencies—ensures your gear stays secure during transport.

Simple Installation

1. Use the included M3 hex key to remove the four factory Sigma screws.
2. Mount the SIGFR-003 using the four provided high-strength screws.
3. Pro Tip: For long-term security, we recommend applying a drop of Loctite 242 (blue) to prevent screw loosening over time.

Specifications

• Lens Compatibility: Sigma 300-600mm F4.0 DG OS Sports
• Material: 6061-T6 Aluminum
• Finish: Black Anodized Coat
• QD Sockets: Two (2) Integrated Stainless Steel
• Hardware: M3 hex key and four mounting screws included