SLR Lens to T-Thread Adapters, for Canon EOS and...
This adapter bayonets onto the back of your Canon EOS lens and
presents male M42 T-threads. (M42 x 0.75mm for astronomy gear,
not M42 x 1 mm "Pentax threads" common in the camera world.)
The adapter is as short as we can make it to allow focusing with
almost any camera format, with the focus plane about 18mm from
the back face of the adapter.
In many cases extender rings or spacers will be needed to get
the right focus range for your setup. Common 1.25" eyepieces
focus with about 29mm setback. The Meade DSI (with ScopeStuff
DSIF Low Profile T-thread Faceplate) focuses with 15mm of
extension. C and CS Mount cameras should work fine, we will test
those and provide the numbers and suggested adapters.
With no space to work with, the bayonet lock isn't a fancy spring
loaded button. With the adapter installed on your lens, you tighten
a setscrew with a nice dog-tip that securely locks to the lens without
marring lens parts. Allen wrench provided! Aluminum and ABS
components, steel springs and screws.
Click on images to enlarge: (Lens, eyepiece, adapter and ruler not included)
Price includes shipping in the USA!