Originally posted by pimpim As for weight and minimum focus distance, I don't have a scale
and I don't really know how to figure out minimum focus distance.
Minimum focus is a bit of a problem for zooms I guess, but I'd focus at the closest distance on a flat object, then measure to the camera focal plane. Not sure where the focal plane actually is but on K20D I think it was pretty close to the back of the flash housing.
Failing this just read it from the lens distance scale as a ball park figure.
Originally posted by pimpim Is it usual to put exotic lenses in the database or doesn't it make much sense?
If it will fit a Pentax then it should go in the database, particularly K mount or the old Pentax screw mount. Within this, the more exotic the better.
I've resisted adding old Nikkor lenses which can be fitted with the same functionality as screw mount lenses.