3.25 Inch Arca-Swiss Conversion Clamp for Manfrotto 054, 055, 057, and MHXPRO Series

The Hejnar Photo 3.25-Inch Manfrotto Conversion Clamp is a specialized professional upgrade designed to bridge the gap between Manfrotto's magnesium ball heads and the industry-standard Arca-Swiss system. This precision conversion kit allows you to replace proprietary Manfrotto platforms with an expanded 3.25-inch Arca-type clamp, providing a larger mounting surface for heavy camera bodies and telephoto lenses. Proudly CNC-machined in the USA from solid 6061-T6 aluminum, it offers a rock-solid, anti-twist fit that outperforms generic adapters.

System Compatibility

This clamp is engineered for a perfect fit on the following Manfrotto ball head series:

• Magnesium Ball Heads: 054, 055, and 057 Series (specifically models with Q2 and Q5 quick release).
• Compact/Mid-Range Series: 494, 496, and 498 Ball Heads.
• XPRO Series: MHXPRO-BHQ2 Ball Heads.

Simple 3-Step Installation

1. Remove Platform: Unscrew and remove the original Manfrotto quick-release platform from the ball head post.
2. Align Components: Line up the precision-machined slots on the back of the Hejnar clamp with the anti-twist island on the Manfrotto post.
3. Secure Setup: Attach the new 3.25" Arca-Swiss compatible clamp using your original Manfrotto center screw.

Quick Overview & Key Features

• Expanded 3.25" Jaw Length: Provides increased surface area for more secure clamping of long rails and large camera plates.
• Anti-Twist Rear Profile: Machined with a custom recess that "locks" onto the Manfrotto stem island, preventing any rotational play during use.
• Reuse Original Hardware: Seamlessly integrates with the factory Manfrotto center screw for maximum mechanical reliability.
• Universal Arca Standard: Fully compatible with quick-release plates and L-brackets from RRS, Kirk, Wimberley, and Markins.
• Professional Black Anodized Finish: Finished with a durable hard-coat layer to resist scratches and weather in the field.

Comprehensive Product Description

The Hejnar Photo 3.25-Inch Manfrotto Conversion Clamp is the ultimate solution for photographers who value the build quality of Manfrotto ball heads but require the versatility of a unified Arca-Swiss ecosystem. By converting your head, you eliminate the need for proprietary Manfrotto plates, allowing you to use a single plate standard across your entire gear kit.

What sets this 3.25" version apart is its ability to handle larger equipment. The extended clamp jaws provide superior torsional resistance, making it an ideal choice for panoramic photography, macro focus stacking, and supporting heavy telephoto lenses. The precision-milled slots on the underside ensure that once the clamp is tightened with the original center screw, it becomes a permanent, non-rotating extension of the ball head itself.

Designed and precision-machined in the USA, this hardware upgrade modernize your support system without the high cost of a completely new tripod head. It delivers the same structural integrity and technical excellence that define Hejnar Photo equipment.