Only tip is watch the corners, it's an excellent lens but doesn't have huge coverage. I've been very pleased with my Caltar (Symmar S) bought of this forim and have used it quite extensively for hand held 5x4 work in Turkey/Greece. Very sharp lens and just as good as my Sironar's and other Symmar (210mm), you'll enjoy using it. I shoot at f22 most of the tme. Seems a good price as well.