Possible Duplicate: What tool can visualize metadata from many photos on a Mac? What are the best EXIF analyzer tools to give you statistics and pretty graphs with information such as: ...
Many people recommend a focal length of 35mm, 50mm, and sometimes even 85mm and upwards for those interested in purchasing a prime lens. I, however, would like to figure out what focal length(s) I use ...
I have seen/heard about a PC/Unix (??) utility that goes through all your JPG/RAW pictures on your disk and shows you on a graph your most used lens, your most used zoom range, flash settings ...