----- Original Message ----- From: "Don Sanderson"
> I have a 28-90mm F:2.8-3.5 macro zoom here that I've rebuilt and not sure I > did it correctly. > It's a VariFocal type, the focus changes as the FL is changed, it focuses > much closer at the 28mm end than at 90mm. > So far, so good. Now here's the issue, it focuses just to infinity at 28mm > but somewhat *past* infinity at 90mm. > Has anyone seen a lens that exhibits this behaviour? > I *think* I've re-assembled it correctly but since it was in pieces when I > got it I can't be 100% certain. > I do know that the elements are in their correct positions, won't fit any > other way. > Seems very sharp and bright at all FLs, other than the one odd behaviour it > seems OK. > It's another old Vivitar Series 1 by the way. Lotsa lenses do that. Don't worry about it. William Robb
