Male thread - M42X0.75; Female thread - M42X0.75; eliminates a range of focusing problems
The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography.
Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners
Having the right equipment to shoot art-gallery images of the heavens starts with the right telescope; camera and camera adapter
Useful accessory allows you to attach a Nikon 35mm DSLR or SLR camera to a telescope; camera adapter; off-axis guider; and other astrophotography accessories