SVBONY SV158 2inch Extension Tube Telescope Extension Tube Optical Length 45mm for Astrophotographic Applications (75mm)

SVBONY SV158 2inch Extension Tube Telescope Extension Tube Optical Length 45mm for Astrophotographic Applications (75mm)

Extension tube optical length 45mm; provides extra focuser back travel for for astrophotographic applications Standard 2-inch device; Fits in 2" telescope focusers; and accepts 2" eyepieces or accessories Features a brass compression ring to prevent the marring of your telescope accessories; with locking thumbscrews to secure inserted accessory All made of metallic materials; Machined of aluminum and anodized black; durable for long time use Threaded for use with standard 2-Inch astrophotography filters and has a matting effect; effectively reducing the reflection of stray light The SV158 2" extension tube provides extra focuser back travel; which is sometimes needed to achieve focus with certain eyepiece telescope combinations; More back travel is often needed for short-range terrestrial viewing through a telescope; or with use of a field flattener; coma corrector; or focal reducer lens

Optical length 45mm
The SV158 2" extension tube total length is 75mm and provides extra 45mm focuser back travel

2 inch adapter thread
This SV158 2" extension tube features threaded for use with 2" filters; the threaded can also effectively reduces the entry of stray light

Using high-quality manufacturing materials
Machined of aluminum and anodized black; durable for long time use

Brass pressure ring design
The extension tube has a brass compression ring in the connection port; which can effectively prevent scratches on your precious accessory

Specifications:
Material: Aluminum Alloy
Color: Black
Specification:2" Extension Tube L=75mm
Dimensions (mm):59x75 mm
Weight (g): 108g

Package Includes:
1x SVBONY SV158 2 " Extension Tube