M54x0.75 Focal Length Extension Tube for Astronomical Telescope Photography Aluminum Threaded Adapter for Extending Back Focus with Scopes Lenses MPCCs Guide Scopes(M54*0.75-3mm)

M54x0.75 Focal Length Extension Tube for Astronomical Telescope Photography Aluminum Threaded Adapter for Extending Back Focus with Scopes Lenses MPCCs Guide Scopes(M54*0.75-3mm)

• [AVAILABLE LENGTHS] Single-piece focal length extension tube in M54x75 format, selectable lengths 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm, 30mm, 40mm, 50mm so you can match exact back focus needs for your setup.
• [STACKABLE THREAD DESIGN] Both internal and external M54x75 threads permit stacking with adapters, washers and accessories for precise spacing while preserving coaxial alignment of the optical path.
• [CORRECTS INSUFFICIENT BACK FOCUS] Adds the extra spacing needed between camera sensor and optical elements so visual and imaging accessories reach critical focus while helping to limit edge shading.
• [ANTI-GLARE CONSTRUCTION] Black anodized finish and matte internal surfaces reduce stray light and reflections inside the tube, supporting cleaner results during long exposures.
• [USE CASES & COMPATIBILITY] Suited for telescopes, guide scopes, MPCCs, focusers, field flatteners and filter wheels used in astrophotography and planetary imaging; verify M54x75 thread fit before pairing.