M48/M42 Astronomy Adapeter Ring Extension Tube, Professional Telescope Adapter Ring 3mm to 30mm 1 Piece

Product Description:
Fully metal construction and anodizing aluminum process, sturdy 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 exteri0r 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.
Type: Astronomical Telescope T2 thread Extension Tube
Extension Tube Height options: 3mm 5mm 7mm 10mm 12mm 30mm
Thread options: M42*0.75mm, M48*0.75mm
Color: Black

Note:
Please allow 0-2mm error due to manual measurement.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!