Sigma 300-600mm F/4.0 DG OS Sports Arca-Type Foot

The 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.

Quick Overview

• Model: SIGFR-001
• Direct replacement specifically for the Sigma 300-600mm F/4.0 DG OS Sports Lens
• Double-Dovetail Profile: Allows for dual clamping surfaces and secondary accessory mounting
• Dual QD Sockets: Integrated stainless steel Quick Detach sockets for secure strap mounting
• Ergonomic Design: Ample finger clearance for focus 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 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.

Integrated QD Carrying Security: 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.

Simple Installation

1. Use the included M3 hex key to completely remove the four factory Sigma mounting screws.
2. Position the SIGFR-001 foot and secure it to the lens collar using the original Sigma screws.
3. Pro Tip: If your mounting screws tend to loosen over time, consider using a drop of Loctite 242 (blue) for added security.

Specifications

• Lens Compatibility: Sigma 300-600mm F/4.0 DG OS Sports
• Material: 6061-T6 Aluminum
• Finish: Black Anodized Coat
• Profile: Double-Dovetail Arca-Type
• Package Includes: SIGFR-001 Foot and M3 hex key