The Hejnar Photo M577-350 Adapter Set is a precision-engineered solution designed to bring universal Arca-Swiss compatibility to your Manfrotto video support system. Specifically engineered for heads utilizing the 3433PL (501PL) mounting plate system—including the 501, 503, 3433, 3460, and 3465—this comprehensive kit provides a rock-solid, modular bridge between professional video heads and photography gear. Proudly CNC-machined in the USA from solid 6061-T6 aluminum, it allows you to utilize Arca-style plates, L-brackets, and accessories without compromising the smooth fluid movement of your Manfrotto head.

SAE Technical Specifications

Detailed Installation Instructions

Modernize your video head in just a few simple steps using the included hardware:

1. Secure the Adapter Plate: Slide the Hejnar adapter plate into your Manfrotto head just as you would a standard 501PL plate.
2. Mount the Arca-Swiss Clamp: Use the included alignment pins to set your preferred orientation (parallel or perpendicular) and secure the F63b clamp to the plate.
3. Lock Rotation: Tighten the clamp to the plate; the integrated pins and secondary alignment holes prevent any accidental rotation under heavy camera loads.

Quick Overview & Key Features

• Complete Modular System: The Arca-style clamp can be detached from the plate and used independently on other equipment like rails or monopods.
• Rotational Ergonomics: Included alignment pins allow the clamp to be mounted in multiple orientations to clear cables or suit your specific shooting style.
• Field Reliability: The captive knob design stops at its maximum opening, ensuring it cannot be lost in the field.
• Precision Build: Hard-coat black anodized finish on the plate and clamp provides superior resistance to abrasion and corrosion.

Comprehensive Product Description

The Hejnar Photo M577-350 Manfrotto to Arca-Swiss Adapter Set is the definitive upgrade for professionals who demand the smooth, fluid control of a video head combined with the modular security of the Arca-Swiss ecosystem. By converting your 501, 503, or 577 series head, you bypass the inherent limitations of proprietary sliding plates, ensuring your micron-level gear adjustments translate perfectly to your final capture.

Machined from a solid block of aircraft-grade 6061-T6 aluminum, the structural integrity of this system ensures zero flex, even when supporting heavy professional video payloads. The F63b clamp features a sophisticated "tongue-in-pocket" design that protects its internal threaded stud from dust and grit, while keeping the jaws perfectly aligned with your plate's geometry. Integrated safety stop relief grooves provide an essential fail-safe, preventing your gear from free-falling if the clamp is accidentally loosened.

Proudly made in the USA, this component embodies the technical excellence and rigorous tolerances that distinguish Hejnar Photo from mass-produced alternatives. It is an intelligent, high-value investment that modernizes your existing support architecture for ultimate reliability across all your tripod and monopod rigs.