Dark Clear Skies M54M to M42M Back Focus Spacer – 1.5mm Wide Field Imaging eliminating the need to locate

eliminating the need to locate adjustment clamps in low light

Cooling is one of the main reasons to choose a dedicated astronomy camera over a DSLR or mirrorless camera

allowing seamless attachment to tripods

When used with the 61EDPH-III this flattener improves image quality in the corners of the field and reduces chromatic aberrations

Dark Clear Skies M54M to M42M Back Focus Spacer – 1.5mm Wide Field Imaging eliminating the need to locateThe Dark Clear Skies M54M to M42M Fine Back Focus Spacer (1. 5 mm) is a precision machined spacer designed for fine adjustment of back focus distance in astrophotography imaging trains. Purpose & Use Many telescope reducers and field flatteners require a precise back focus distance to deliver optimal star shapes and edge correction. Small spacing errors of even 12 mm can noticeably affect image quality, particularly with fast optical systems and