This spacer for 3.5" Feather Touch focusers extends the optical path by 75mm.
♦ Fits 3.5" diameter Feather Touch focusers
♦ Connects via a thread between the extension tube and the eyepiece adapter
♦ Reduces existing back focus due to its 75mm optical length
TS-Optics 75mm extension for FTF 35 focusers.. - spacer for 3.5" Feather Touch focusers
This extension connects to the eyepiece or camera side of the focuser. It connects via a thread between the extension tube and the eyepiece adapter, increasing the distance from the focuser to the eyepiece or camera and thus reducing the back focus that is still present.
The extension fits all FTF35xx focusers.
|Can be used with:||3.5" Feather Touch focusers|
|Extension (optical path):||75 mm (2.95")|
|Connection to:||Draw tube and eyepiece adapter|
|Female thread:||4 3/32"-24 TPI|
|Male thread:||4 3/32"-24 TPI - length 8 mm|