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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 us and we'll make it right.

Specification:

- Type: Astronomical T2 Thread Extension Tube
- Male thread: M42*0.75mm
- Female thread: M42*0.75mm
- 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!