Originally posted by Rory Have you tried allowing use of aperture ring in the settings menu and do it manually in M mode?
Yes, I use mine with that setting enabled. The problem is that there's no way for me to get a light reading w/ the tubes. I plan to try using the green button to meter wide open, and then adjust from there.
Right now, using tubes on my K-x, it's like using an old Pentax K1000 with a dead battery
EDIT:
Originally posted by newarts I use adhesive backed aluminum foil (Aluminum Duct Tape) and usually cover the whole lens base - it'll last longer & look better.
Well, I'll keep that in mind for future reference; however, the tubes are John's, so I'll try to hold off attacking his equipment with duct tape for the time being