Canon EF 400mm f/4.0 DO IS II Low Profile Replacement Foot with QD Socket

The Hejnar Photo H133 is a specialized 4.5" low-profile replacement foot for the Canon EF 400mm f/4.0 DO IS II lens. This precision-machined foot features an integrated Arca-Swiss style dovetail, a double-dovetail profile for dual clamping, and a built-in stainless steel Quick Detach (QD) socket for secure sling-style strap systems. CNC-machined from 6061-T6 aluminum.

Quick Overview

• Model: H133
• Custom-fit replacement foot for Canon EF 400mm f/4.0 DO IS II
• Integrated stainless steel QD port for push-button sling-style strap systems
• Double-dovetail design allows for clamping on both top and bottom surfaces
• Arca-Swiss style dovetail works with RRS, Wimberley, Kirk, Markins, and more
• Two M3 safety stop screws prevent accidental slide-out or free fall
• Durable 6061-T6 aluminum build with black hard coat anodized finish
• Made in the USA

Product Description

Upgrade your Canon EF 400mm f/4.0 DO IS II lens with this low-profile replacement foot from Hejnar Photo. This foot replacement is designed to lower the lens's center of gravity for improved balance on tripod and gimbal setups, providing a more stable mounting solution than the factory base.

The double-dovetail profile serves as an invaluable asset, giving you a reliable secondary clamping surface on the top side of the rail to attach heavy-duty flash brackets or secondary accessories. Safety is a priority: the rail is equipped with two M3 safety stop screws to ensure your gear stays on the track even if the clamp is accidentally loosened.

For maximum mobility, this foot integrates a stainless steel Quick Detach (QD) socket. This heavy-duty system allows you to click on push-button sling-style strap systems for fast transitions and comfortable field carry, then detach instantly to lock into your rig.

Installation Instructions:
To remove your original factory foot, use the included M3 hex key tool to extract the Canon mounting screws. To install the H133, use the provided screws to firmly secure the replacement foot to the lens collar. For long-term security in rugged outdoor conditions, consider applying a drop of LocTite 242 removable threadlocker to the mounting screws.