01-22-2014, 12:41 AM
Quote:well, I guess the weight from that link is just wrong.
Probably your lens is pretty similar to the earlier 50mm f4 designs, so it would be like this:
http://www.pentaxforums.com/lensreviews/...-Lens.html
Seems like a typo. Boz Dimitrov's page is probably a better resource for older K-mount lenses:
http://kmp.bdimitrov.de/lenses/primes/no...Macro.html
...he usually includes optical formula diagrammes too:
http://kmp.bdimitrov.de/lenses/primes/_o...-Macro.gif