I have probably used almost all enlarging lenses ever made from 30 mm to 360mm. If you are printing 35mm negatives I think that the El- Nikor 63 (actually I thought it was a 62mm) is probably the sharpest I have ever used without exception, and I am a huge Schneider Companon S fan. I would recommend the El-Nikor without hesitation. Fred Imaging Services Marshall Space Flight Center(posted 8904 days ago)