I have been shooting 4x5 for about 2 years now and have a 90mm Nikkor f8 and a 1 50mm f5.6 Fuji W. I am happy with both of these lens and hope to add a 270mm or 300mm in the near future. I have been in the dark long enough concerning lens types. There is always talk on this forum and elsewhere of Tessar, Anastigmat, P lasmat and others,I think. I don't know what any of this means and have had litt le luck finding any reading on the subject. Any suggestions as to where I might go to find more info on these lens types ?