Precision M42x0.75mm Threaded Spacer Rings (Male + Female) Each extension ring features both male and female M42x0.75mm threads for seamless stacking and secure connection with T2/M42 components, such as T-rings, OAG units, filter wheels, and camera adapters. Perfect for adjusting back focus in your optical train.
Complete 7PCS Size Set for Full Flexibility Includes 3mm, 5mm, 7mm, 10mm, 15mm, 20mm, and 30mm rings to achieve precise spacing from 3mm to 80mm, covering all your needs for telescope focus adjustment, macro photography, and custom DIY modifications.
Designed for 1.25" Telescope Systems Compact spacer rings fit perfectly into space-constrained 1.25" optical setups, ideal for small astro cameras, guide cameras, and lightweight imaging trains without taking up unnecessary space.
Durable CNC Aluminum with Anti-Reflective Finish Made of high-quality CNC-machined aluminum alloy with a matte black oxide finish. The low-glare treatment reduces stray light interference, while cleanly machined threads ensure smooth, tight assembly every time.
Consistent Fit for Reliable Imaging Results Precision-manufactured rings maintain proper alignment when adjusting spacing, which is essential for calibrating reducer/field flattener distances and keeping your camera in perfect focus for consistent, repeatable astrophotography shots.
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Item Specification Product Name T2 (M42x0.75mm) Extension Tube Spacer Set Material CNC Machined Aluminum Alloy Finish Matte Black Oxide / Anti-Reflective Thread Pitch M42x0.75mm (Male + Female, Stackable) Included Sizes 3mm, 5mm, 7mm, 10mm, 15mm, 20mm, 30mm Compatibility All T2/M42x0.75mm threaded accessories, 1.25" telescope systems Package Contents 7 x Extension Spacer Rings