Eyspon m48x0.75 kits de tubo de extensão de comprimento focal 3/5/7/10/12/15/20/30mm para fotografia de telescópio astronômico t anel de extensão

Product 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 M48 interior thread and a M48 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.
Type: Astronomical Telescope M48 thread Extension Tube
Extension Tube Height: 3mm 5mm 7mm 10mm 12mm 15mm 20mm 30mm
Male thread: M48*0.75mm
Female thread: M48*0.75mm

Outer Diameter: 2 Inch(about 50.8mm）
Color: Black

Package Include:

1 x M48 Extension Tube Kits (3/5/7/10/12/15/20/30mm)

Please Note: This Combi are M48 (48mm) thread caliber, not M42 thread caliber

Due to different production batches, the two paint color on the surface(Matte black; shiny black) are shipped randomly.

Note:

Please allow 0-2mm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
If you really care about these details, pls DO NOT order.

Why use its？

When you cannot get to the right focal plane for focusing with a camera or eyepiece. This extension tube kit solves this problem. You can use this extender with any camera or eyepiece or with various adapters. The M48 * 0.75 threads on both ends make it extremely versatile.
Use this extender for obtaining the correct image scale or for the exact spacing required for a reducer or field flattener.

You can reach the extension length required by combining several extenders of different lengths.