In article <4gfkp9$fiv@linus.mitre.org>, CMAURO@MITRE.ORG says...

>how different is the 24mm from the 28mm? I have a 35mm and was >thinking of going wider and thought the 24 would be substantially >different from the 35mm but am not sure of the difference from the >28mm...

The 24 is to the 28 what the 28 is to the 35 - just noticeably different, but not "revolutionarily" different. If you have a 35mm,
get a 24 unless there is a strong reason for the 28. If you have a 50
and no 35, skip the 35 and (maybe) the 24 and get a 28.....(unless you
get a 24) - don't get both a 24 and 28, or 28 and 35, or 20 and 24, etc. Hope This Helps.