the older adaptall2 tamron 90mm f/2.5 version was one of the sharpest lenses they ever made. the later AF 2.8 version not so...it's a different optical design, which didn't get the same acolade the earlier MF version did.
Without going for manufacturers lenses/prices I would agree with Andy in that the Sigma 70mm has certainly received the best vevues.
The 105mm sigma was certainly one of the best macro sellers when I worked in a local camera shop. not the best build quality (check out the Tokinas for that), but certainly one of the best bits of glass from the independant manufacturers
__________________
primarily using Nikon film and digi kit, and some micro 4/3rds gear for experimenting with old lenses
|