- 1 3/16
- Tele Vue
The product details state, "... you can now add another 2" onto any Tele Vue threaded 2" eyepiece.." I didn't really expect this extension to add another 2' to my eyepiece, but was hoping it would. It does add 1 3/16" which is really all I need.
The item I ordered was shipped quickly...right one.
Beware - the thread on this adapter is for tele-vue eyepieces ONLY. The thread is not the same as a standard 2" eyepiece filter. I just bought 2 of these and after about 1 turn, the threads lock up. Seems they are the same OD but slightly different pitches. Will be returning. I'm sure if you have a TV eyepeice it'd be great. But the description could have used more clarification. 3 stars. Product not defective, but description misleading.
To bring my video camera to focus on my Dob, I use a shortened set of truss poles. Now with the barrel extender, I can also use my 13mm Ethos. I have the best of 2 worlds-a set up for both video and visual viewing without having to switch truss poles.
This solved the problem of bringing telescope images to focus with my TeleVue 2 inch eyepieces on a refractor.