Description:

Fully metal construction and anodizing aluminum process, durable 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 a T2 interior thread and a T2 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems.
Please Note: This is M42 (42mm) thread caliber, not M48 thread caliber.
Please make sure this is the correct size and thread before purchasing; If you have any problems about your purchase, please don't hesitate to contact we'll make it right.

Specification:

Type: Astronomical T2 Thread Extension Tube
Male thread: .75mm
Female thread: .75mm
Length: 3mm 5mm 7mm 10mm 12mm 15mm 20mm 30mm(Optional)
Color: Black

Size Chart:

42mm/1.65inch
3mm/0.12inch
5mm/0.20inch
7mm/0.28inch
10mm/0.39inch
12mm/0.47inch
15mm/0.59inch
20mm/0.79inch
30mm/1.18inch

Package Includes:

1*Extension Tube

Note:

1. Please allow slightly error due to manual measurement.
2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
3. Wish you a wonderful online shopping!