M90 to M90 Extension Tube 25mm | Dark Clear Skies DSLR Alternatives Allows instant filter changes without

Allows instant filter changes without altering backfocus

Material: Durable aluminium construction ensures longevity and optimal protection from solar glare

Before starting to photograph: light pollution and power

Secure communications are an essential requirement

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M90 to M90 Extension Tube 25mm | Dark Clear Skies DSLR Alternatives Allows instant filter changes withoutM90 to M90 Extension Tube 25mm The Dark Clear Skies M90 to M90 25mm Extension Tube is a precision machined spacer designed for fine back focus adjustment in astrophotography imaging trains that use large diameter M90 threading. Featuring M901 male threads on both ends, this extension tube is ideal for making smaller spacing corrections when pairing reducers, flatteners, filter systems, and cameras that require accurate optical spacing. The 25mm