Hello all,
I have a Tamron SP 500 mirror (the 2nd gen one 55BB) and I was very happy with it on my old Pentax ME super, I bought one of the adaptors from Hong Kong of e-bay and whilst it is superbly made and fits like a glove, silly me didn't read up on them first and it does not have the AF chips on it. This means I have to focus manually and it's not too easy for me through the view finder, I know I'd have to do that anyway, but there is no audible beep to take at least some of the guess work away. Hence I'd like to put one of these chips into the lens mount so I know I've got it focused correctly.
Now, I have a couple of questions if I may.
1. The chips without the adaptor are available on e-bay. Has anyone done a self conversion on these? I'm presuming it's a case of glue it on in the right place.
2. If I buy a wholly new adpadtor, which isn't a great expense, do I need to go for a EXIF preset chip, or a programmable one?
3. How accurate is the focusing chip to the image? I would have presumed it was pretty good, but it's worth asking.
Cheers all,
Noel.