Originally posted by jolee1990 wait so the older version was the A? and the newer version is FA?
Both are "old" in the sense of having been discontinued long ago, but yes, the A series lenses (these have no autofocus) are older than the FA series (these have autofocus).
Quote: i am sorry for all these questions but is there a article or osmething that explains the things about the glasses inside? cause i dont know what makes the difference
i have the 50mm FAf1.4 and i like it but i would like to try the 85 and i have been hearing good stuff about it.
For raw data about the lenses (size, optical construction, what the various abbreviations means, etc) you can see
Welcome to Bojidar Dimitrov's Pentax K-Mount Page
For opinions on the quality of specific lenses, you can see
Stan's Pentax Photography
Also look for the discussions of the 85mm lenses on this forum. You'll find the newer Korean manual focus 85's (the ones you seeing sold under all these different brand names, but when you look at the pictures, it's obviously the same lens) are quite a following. As does the Pentax M85/2.