----- Original Message ----- From: "Jon Glass"
Subject: Re: What series lens do I have?
On Nov 27, 2004, at 5:07 AM, Paul Stenquist wrote:
The "K" designation was unofficial. I think Pentax users just invented that to distinguish that first series of lens options from the later ones.
Oh, I thought the "K" series matched the fact that they came out with the "K" cameras, and the "M" series came out with the "M" series cameras, and the "A" series came out with the "A" series cameras??? At least, that is my interpretation, based on the K-Mount Page...
Thats more or less correct, the different lens versions are/were contemporaneous with different camera lines, however, there are significant differences between the different lines.
The K lenses are somewhat larger, and most people seem to think they are better lenses overall than the smaller M lenses.
The A series lenses and all later lenses have electrical contacts on the mount, and the A position on the aperture ring that allows the camera to control the aperture.
note; since the FAJ lenses don't have an aperture ring, they are locked in permanent A position.
William Robb
