2X M42 Extension Tube Kit 3/5/7/10/12/15/20/30mm M42X0.75 for Astronomy Professional Telescope Astrophotography 16 x M42 x 0.75 Thread Extension Tube(3/5/7/10/12/15/20/30mm) black

2X M42 Extension Tube Kit 3/5/7/10/12/15/20/30mm M42X0.75 for Astronomy Professional Telescope Astrophotography 16 x M42 x 0.75 Thread Extension Tube(3/5/7/10/12/15/20/30mm) black

Fully metal construction and aluminum process for long time use. Use this extension tube for the correct image scale or the exact spacing required for reducers or field flatteners. The extension tube has a T2 interior thread and a T2 exterior thread...


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