Here are my thought
I used a 125, 90, 75 and 58 for my wide angle set. The 75 and the 90 are quite different and worth having one of each. The 58 is also different than the 75 and worth having. I skipped a 65 becasue the models that were out when I was working offered little movement whereas the 75 and 58 had movement (front rise is used a lot). The 125 - a 120 would be the same - was noticeably longer than the 90.
After the 90 well if you need something qwider go for the 75/72. If you need something longer go for the 110/120/125. Let your needs decide what you need next.
steve simmons
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