I recently acquired a Leaf Aptus 22 and I am using it on my RB67. I have three RB67 C lenses and they all trigger the aptus fine, but for some reason when I try my 90mm KL lens it won't trigger the back. I've tried hooking up a flash to the sync port on the KL lens and it fires every time, so I'm really confused as to what would be causing it to trigger the back.
Any incite would be appreciated. Thanks!
Any incite would be appreciated. Thanks!