Pro Grade Astro Imaging M42 Spacer Kit With 7.5mm 12mm And 30mm Rings For Back Focus Fine Tuning Between Camera And Telescope Easy T Ring And T Adapter Threads Black

Back-Focus Spacer Kit for Astro Cameras: 7.5/12/30mm M42
✔️ Includes 7.5mm, 12mm, 30mm spacers for precise back-focus

A handy spacer kit for astro imaging designed to dial in the exact distance between your camera and telescope for sharp images. Fine-tuning back-focus helps keep stars pinpoint across the frame and improves edge-to-edge performance. It is compatible with T-thread camera adapters and is commonly used with EdgeHD, Schmidt-Cassegrain, and RASA 8 optical tubes. The spacers are machined aluminum, black anodized, with blackened interiors for contrast and knurled surfaces for easy threading.

✅ 3 spacers included: 7.5mm, 12mm, 30mm
✅ Machined aluminum, black anodized with glare-threaded interiors
✅ M42 x 0.75 (T-thread) compatible with camera adapters and T-Rings
✅ Knurled outer surface for grip when threading/unthreading

💡 What is a back-focus spacer kit used for in astro imaging? This handy accessory helps you set the correct distance between your camera and telescope for peak image quality.

• Back-focus tuning improves corner performance on full-frame sensors
• Works with M42 x 0.75 T-thread adapters and T-Rings
• Three spacer lengths give you repeatable back-focus distances
• Designed for quick, secure threading with knurled spacers

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