Description:

- Fully metal construction and anodizing aluminum process, for long time use.
- Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.
- The extension tube has interior thread and exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems.
- The required spacing can be achieved by combining several extenders of differing lengths.
- Please Note: This is (48mm) thread diameter, not M42 thread diameter. Please make sure this is the correct size and thread before purchasing.

Specification:

- Type: Astronomical Telescope thread Extension Tube
- Male thread: *0.75mm
- Female thread: *0.75mm
- Length: 3mm 5mm 7mm 10mm 12mm 15mm 20mm 30mm(Optional)
- Color: Black

Size Chart:

3mm/0.12inch
5mm/0.20inch
7mm/0.0.28inch
10mm/0.39inch
12mm/0.47inch
15mm /0.59inch
20mm/0.79inch
30mm/1.18inch

Package Includes:

(4 Pack)
1 Extension Tube