I've had a Tamron 500mm f/8 reflector lens around for years. Now I've finally put it to use. With fixed aperture f/8 it's rarely useful for photography, but using it as a secondary telescope is actually really clever (got the idea from someone on the net, obviously).
The mount goes, from left to right:
- reflector lens
- t2/fd adapter
- fd rear cap /w drilled hole & glue
- celestron t-ring/eyepiece holder
- 1,25" eyepiece
And there's a bonus: because of the customised fd lens cap, it is possible to mount the eyepiece to any of my old Canon FD lenses. Works great with 35-105 f/3.5 and 100-300mm f/5.6 for both 25mm and 12mm eyepieces. Way to re-use your FD optics :)
