M54x0.75 Extension Tube for Telescope Photography,Anodized Aluminum Build with Matte Interior to reduce Glare,for Back Focus Correction with Focuser(M54*0.75-3mm)

M54x0.75 Extension Tube for Telescope Photography,Anodized Aluminum Build with Matte Interior to reduce Glare,for Back Focus Correction with Focuser(M54*0.75-3mm)

• [PRECISION SPACING FOR ASTRO IMAGING] Use this M54 x 75 length extension tube to correct back focus for cameras, focusers and field flatteners, enabling sharper stars and improved edge performance in telescope photography.
• [AVAILABLE LENGTH OPTIONS] Choose from multiple lengths 3mm to 50mm to achieve exact spacing needs; selecting the correct tube helps reduce coma and improves focus for ACROSS the sensor.
• [SECURE M54 THREAD INTERFACE] Both internal and external M54 x 75 threads provide repeatable, secure connections for stacking adapters, maintaining optical alignment during long exposures.
• [DESIGNED TO CONTROL STRAY LIGHT] Anodized black finish and matte internal threads reduce stray reflections and internal scattering, contributing to better contrast for planetary and deep shots.
• [SIZING REMINDER] PLEASE CHECK YOUR OWN SIZE CHART RATHER THAN AMAZON'S SIZE CHART and measure your current back focus or adapter stack to choose the appropriate tube length.