Arca-Swiss Conversion Adapter Plate for Manfrotto 405 Geared Head (Panning Clamp Mount)

The Hejnar Photo M405P Conversion Plate is a precision-engineered upgrade designed specifically for photographers who want to add a panning clamp to their Manfrotto 405 Geared Head. This listing includes the adapter plate only and is designed for an unyielding, non-twisting mount for technical architectural and panorama photography. Proudly CNC-machined in the USA from solid 6061-T6 aluminum, this plate allows you to bypass proprietary Manfrotto systems while retaining the precise 3-axis geared control you trust.

Important: A separate Panning Clamp is REQUIRED to use this system. Clamps from Benro (PC1) or RRS with 2.18 inch (55 mm) hole spacing are fully compatible.

SAE Technical Specifications

• Compatibility: Engineered exclusively for the Manfrotto 405 Geared Head.
• Clamp Requirements: Requires a panning clamp with a 2.18 inch (55 mm) hole-center to hole-center mount.
• Proven Fit: Compatible with Benro PC1 and Really Right Stuff (RRS) panning clamps.
• Plate Dimensions: 3.56" Long x 2.56" Wide x 5/8" Thick.
• Mounting Holes: Features one 1/4-20 center tapped hole and eight 10-32 tapped holes in 90-degree increments (30mm or 45mm spacing).
• Material: CNC-machined solid 6061-T6 Aircraft-Grade Aluminum.
• Finish: Durable black hard-coat anodized surface.
• Manufacturing: Designed and manufactured in the USA.

Detailed Installation Instructions

Upgrade your geared head in two simple steps:

1. Remove Factory Components: Use the provided 3 mm hex wrench to remove the original Manfrotto lock-down level and mounting hardware.
2. Secure the Adapter Plate: Attach the Hejnar plate to the geared head stem using the provided 1/4-20 and 10-32 screws. Ensure the plate sits flat against the head during installation.

Quick Overview & Key Features

• Built-in Alignment: Features an integrated bubble level for precise 3-axis leveling directly on the plate.
• Precision Panning Support: Perfect for photographers who rely on 360-degree rotation for panoramic stitching.
• Modular Ergonomics: The 10-32 tapped holes allow you to orient your panning clamp in 90-degree layout increments.
• Rock-Solid Performance: Replaces factory components with a rigid aluminum bridge to eliminate flex during long-exposure architectural work.

Comprehensive Product Description

The Hejnar Photo Manfrotto 405 Conversion Plate is a new product design built for architectural, studio, and interior photographers who demand both geared precision and panoramic modularity. By converting your Manfrotto 405, you permanently resolve the "play" often found in stock quick-release systems, ensuring your micron-level framing adjustments translate perfectly into your final images.

This plate is specifically optimized for use with high-end panning clamps. It supports the standardized 2.18 inch (55 mm) hole centers utilized by industry leaders like Really Right Stuff (RRS) and Benro (PC1 series). The ability to position your clamp in 90-degree increments allows you to tailor the rig to your specific ergonomic needs, staying clear of camera cables or bodies.

As a superior alternative to products from competitors like Kirk or Leofoto, this USA-made component provides the structural integrity and tight tolerances required for professional field use. It is a robust, cost-effective way to modernize your support system while maintaining the reliable 3-axis gearing of your Manfrotto 405 head.