Arca-Swiss Conversion Adapter Plate for Manfrotto 400 Deluxe Geared Head

The Hejnar Photo Manfrotto 400 Conversion Plate is a precision-engineered solution designed for professionals who demand the incremental accuracy of the 400 Deluxe Geared Head but want the modular flexibility of the Arca-Swiss ecosystem. This adapter plate only (clamp sold separately) replaces the bulky factory mounting platform with an unyielding, low-profile foundation for medium format systems and professional rigs. Proudly CNC-machined in the USA from solid 6061-T6 aluminum, it provides the structural integrity required for precise architectural, interior, and macro photography.

Note: An Arca-Swiss Quick Release Clamp is REQUIRED to use this plate and is sold separately.

SAE Technical Specifications

• Compatibility: Engineered exclusively for the Manfrotto 400 Deluxe Geared Head.
• Dimensions: 3.56 inches long x 2.56 inches wide x 5/8 inch thick.
• Versatile Mounting: One 1/4-20 tapped center hole and eight 10-32 tapped holes placed at 90-degree increments.
• Hole Spacing: Mounting distance between 10-32 holes is 30mm or 45mm.
• Material: Precision CNC-machined from solid 6061-T6 Aircraft-Grade Aluminum.
• Finish: Durable black hard-coat anodized for superior abrasion and corrosion resistance.
• Manufacturing: Designed, machined, and quality-tested in the USA.

Detailed Installation Instructions

Modernize your geared head in a few simple, fully reversible steps:

1. Remove Factory Platform: Loosen the two hex socket screws holding the bridges on each side of the original mounting platform using the provided hex wrench.
2. Detach Lock-Down Mechanism: Remove the original quick release lock-down mechanism by unscrewing the two flat head screws on the back of the platform.
3. Secure the Adapter Plate: Slide the round section of the M400 adapter under the front V-groove and secure it from underneath using the provided industrial-grade hex socket screws.

Quick Overview & Key Features

• Precision Geared Foundation: Maintains the 400 Deluxe's exact multi-axis geared adjustments while providing a modern Arca-Swiss interface.
• Modular Versatility: The eight tapped holes allow you to position your chosen Arca-type clamp in 90-degree increments for ideal ergonomic control.
• Zero Rotational Play: Precision-milled registration ensures the plate sits perfectly flush against the head for an anti-twist, zero-play interface.
• Professional Profile: Replaces factory components with a rigid aluminum bridge, significantly reducing vibration during critical long exposures.

Comprehensive Product Description

The Hejnar Photo Manfrotto 400 Deluxe Geared Head Conversion Plate is the definitive upgrade for photographers who require the incremental precision of a geared head but want the standardized flexibility of the Arca-Swiss ecosystem. By converting your head, you bypass the "play" often found in stock Manfrotto systems, ensuring your micron-level gear adjustments translate perfectly to your final capture.

This plate is meticulously engineered for the unyielding stability required by medium format systems and heavy professional payloads. The high-density 6061-T6 aluminum construction provides a structural integrity that factory components cannot match, eliminating unwanted bending forces.

Designed and manufactured in the USA, this component provides the technical excellence and rigorous tolerances that distinguish Hejnar Photo gear from mass-produced alternatives. It is a robust, intelligent investment that modernizes your existing field support system for ultimate reliability.