what do the letters on the lens mean?

[Amita Guha]

Hi all, I have a newbie question. I was just wondering about the
significance of the letter(s) before the focal length of a lens. For
example, the A28-135. I checked Boz's page but I couldn't find anything
explaining it.

Thanks,
Amita


-
This message is from the Pentax-Discuss Mail List.  To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .