The Variable Extension Tube is an all-metal structure and anodized finish, so it has a long service life. It has internal T2 threads and external T2 threads, with a variable extension of 24-35mm
The Black SV109 extension tube has a T2 interior thread and a T2 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems
Fully metal construction and anodizing aluminum process, durable for long time use.
Use this extension tube to get the correct image scale or the exact spacing required for reducers or field flatteners.