Sigma MC-21 Adapter Z-Shape Foot with 4" Arca-Swiss Base

The Z-Shape Foot for the Sigma MC-21 adapter is a professional-grade mounting solution designed to provide the same stability and balance typically found on telephoto lenses with built-in foot collars. This assembly consists of a 4-inch Arca-Swiss compatible base and a vertical foot, allowing you to shift the mounting point away from the camera body for superior equipment balance. This setup is essential for photographers using the Sigma EF-L mount converter with heavier glass, ensuring a rock-solid, anti-twist connection.

Key Features & Quick Overview

• Enhanced Stability: Enables standard lenses to be used like telephoto lenses with a tripod collar for better weight distribution.
• Adjustable Balance: The vertical component can be repositioned at different locations along the 4-inch base to find the optimal center of gravity.
• Professional Clearance: Specifically designed to resolve clearance issues when mounting the Sigma MC-21 on monopods, tripods, or in combination with L-brackets.
• Universal Mounting: 4-inch base is natively compatible with Arca-Swiss style clamps from RRS, Kirk, Wimberley, and Markins.
• Premium Build: Precision CNC machined from aircraft-grade 6061-T6 aluminum with a durable black hard-coat anodized finish.
• American Made: Designed and manufactured in the USA.

Professional Z-Shape Mounting System

Upgrade your Sigma MC-21 mount converter with a modular Z-shaped assembly built for field reliability. By moving the mounting point beneath the adapter rather than the camera body, this foot reduces stress on the lens mount and improves overall stability when using adapted Canon EF or Sigma EF lenses. The low-profile design ensures your camera remains easily accessible while providing the necessary height for comfortable tripod use.

Precision Engineering and Modularity: This assembly is designed for the rigors of professional workflows. The vertical Z-component attaches directly to the Arca-type foot base, which is natively compatible with nearly all professional quick-release systems. Note that the specific Arca-Swiss replacement foot for the Sigma MC-21 adapter is required for use with this vertical assembly.

Technical Specifications

• Adapter Compatibility: Sigma MC-21 EF-L Mount Converter
• Base Length: 4.00 Inches (101.6mm)
• Foot Dimensions: 1.8" L x 1.765" W x 2.125" H
• Weight: 2.0 oz (56g) for assembly
• Material: 6061-T6 Aluminum with Stainless Steel Hardware
• Mounting Hardware: One 1/4-20 captive screw and two 1/4-20 mounting screws included