2” Telescope Eyepiece Extension Tube 75mm,90mm

2 inches Telescope Eyepiece Extension Tube with Protective Ring Anodized Black

•  Adds 2" of extension;fits in 2" telescope focusers;and accepts 2" eyepieces or accessories
•  Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope;or for astrophotographic applications
• Features two locking thumbscrews to secure any inserted astronomy accessory
•  Threaded for use with 2" eyepiece and astrophotography filters
• Machined and anodized aluminum tube
• Length:75mm,90mm

Product description:

• Used this as a barrel extension to achieve prime focus using a refractor and a Camera with 2" T-ring adapter.
• This setup retains a field of view that maximizes the capabilities of the camera full-frame CCD.
• Worked great, got the eclipse pics drove out Provides an adequate 2" of focal length to refractors built for star diagonals.
• It is also useful with fast reflectors to bring near Earth-based items into focus, for such tasks as calibrating the finder.
• Provides an adequate 2" of focal length to refractors built for star diagonals.
• It is also useful with fast reflectors to bring near Earth-based items into focus, for such tasks as calibrating the finder
• Just the thing when you need to add a little length to the light path on your telescope. It is well made of metal construction.
• It uses a brass compression ring to hold your eyepieces or accessories securely and help minimize any marking of your eyepiece 'nose'. It is threaded for filters.

Features:

• The adapter will use to extend the length of the eyepiece or other telescope accessories
• Made from high quality solid aluminum, anodized-black
• Total length approx 75mm,90mm
• Package Includes:1 x 2" Telescope Eyepiece Extender with Protective Ring