8" Screw Adjusting Macro Rail with Integrated Digital Scale

The Hejnar Photo 8-Inch Screw Adjusting Macro Rail with Digital Scale provides professional-grade precision for focus stacking and technical macro photography. This linear motion lead screw micro rail combines a rugged mechanical drive with a digital readout, allowing for pinpoint positioning accuracy down to 0.001 inch (0.025 mm). Built in the USA from 6061-T6 aluminum, it features advanced self-aligning linear bearings and a ceramic-coated finish for lifelong performance in demanding environments.

Quick Overview & Key Features

• Integrated Digital Scale: Features instant conversion between metric and imperial readings and a zeroing function at any position for precise relative adjustments.
• Micro-Fine Incremental Adjustments: Lead screw delivers 1.06 mm of travel per revolution, while the digital readout enables 0.001 inch (0.025 mm) precision.
• Self-Aligning Linear Sleeve Bearings: Equipped with a nonabrasive, chemical-resistant PTFE liner for smooth, maintenance-free operation without added lubrication.
• Ceramic-Coated Aluminum Shell: A 0.002" thick ceramic coating provides superior corrosion resistance across a massive temperature range of –400° to +375° F.
• Fast Positioning System: Press the slider release button to quickly slide the carriage to the target position before engaging fine screw adjustments.
• 4-Position Quick Release Clamp: Top Arca-style clamp can be oriented in 90-degree increments to accommodate various camera or rig configurations.
• Load Capacity: Supports heavy setups up to 15 lbs horizontally and up to 10 lbs in a 90-degree vertical orientation.
• Travel Distance: Offers a generous maximum travel distance of 4.00 inches (101.6 mm).

Comprehensive Product Description

The 8-Inch Screw Adjusting Macro Rail with Digital Scale is a high-performance solution for photographers who require the absolute highest level of accuracy. By utilizing a digital display, this rail removes the guesswork from focus stacking, allowing you to move your camera in uniform, microscopic steps. The dual-mode digital head provides instant inch/mm toggling, ensuring it fits perfectly into any technical workflow.

Reliability is engineered into every component. The lead screw drive is housed in a ceramic-coated aluminum frame, shielding it from the elements and ensuring it remains corrosion-free even in humid or freezing field conditions. The PTFE-lined bearing system ensures that the slide remains smooth and free of play, even when carrying heavy professional camera bodies and macro lenses weighing up to 15 lbs.

Compatibility is universal within the Arca-Swiss ecosystem. The bottom rail features a standard dovetail that works with RRS, Kirk, and Wimberley clamps, while the top quick-release clamp is fully repositionable. Whether you are performing high-magnification lab imaging or shooting in the field, this rail provides the uncompromising stability and precision that define Hejnar Photo hardware.