Sigma 500mm f/4 DG OS HSM Sports Arca-Type Foot

The Hejnar Photo SIGFR-001 is a precision-engineered Arca-Swiss compatible replacement foot designed specifically for the Sigma 500mm f/4 DG OS HSM 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.

Quick Overview

• Model: SIGFR-001
• Direct replacement specifically for the Sigma 500mm f/4 DG OS HSM Sports Lens
• Double-Dovetail Profile: Allows for dual clamping surfaces and secondary accessory 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

Enhance the performance of your Sigma 500mm 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.

The foot is carefully engineered to maintain the full functionality of the lens. The height provides comfortable clearance to access the focusing ring while shooting handheld, and the compact profile ensures the lens hood can still be reversed for storage.

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 500mm f/4 DG OS HSM Sports
• Material: 6061-T6 Aluminum
• Finish: Black Anodized Coat
• Profile: Double-Dovetail Arca-Type
• Package Includes: SIGFR-001 Foot and M3 hex key