--- Peter Spiro <[EMAIL PROTECTED]> wrote: > (From previous experience with A and F lenses, I knew I shouldn't > remove the aperture ring, since tiny parts pop out which are almost > impossible to replace.)
I think that's quite misleading because the only reason these tiny bits popped out was that the aperture was not set to 'A' first (both assembling & disassembling). For F/FA lenses, there is nothing to pop out because the A contact is not mechanical, unlike A lenses. > I don't have another 50 f/2, so I don't know if the rear element is supposed > to move when it focusses. Does it? Any tips would be appreciated. I would guess the problem lies at the rear section of the lens where there are 2 metal guiding arms which are somehow not position properly and causing too much pressure on the helicoid and jam it (sign of poor repair). You can try to "shake" the lens tube (the aperture section) and see if it moves. If it is fixed solidly, quite possible my guess was correct. Pentax primes are very simply in design and not much could go wrong. ===== Alan Chan http://www.pbase.com/wlachan __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail
