Well Jeff I just never used a better lens than what I have so I would not know if there's much difference. I'm shooting 35mm b/w, enlarging on besseler 23II XL with dual dichro head. Print 5x7, 8x10, and largest I went was 11x14. I would like to get some 16x20s in the future with acceptable results. I am using a scoponet 20 power grain focuser. I am happy with results but how much different of a result would I get with a 2.8?