>I've used Focal on both my D800 and D800E with all my lenses. >The software works quite well. But the problem is that it >could drive a person crazy for these reasons: > >--With zoom lenses, you will get different AF Fine Tune >settings at different focal lengths. > >--With both zooms and primes, you will get different settings >at different f stops. Most people want to test a lens wide >open, but if, for example, you mostly use a 2.8 lens at f/4, >then it makes sense to test it at that f stop. >
All of the points you bring up are not related to FoCal but with your lenses. Unfortunately with Nikon Cameras you can only set a single adjustment value for each lens even though you sometimes need different values for different focal lengths and different f stops. No tool can get around this limitation.
I have tried buying all kinds of charts and focal rulers etc and have tried to adjust all of my lenses over the past year. After setting up the Focal targets on a wall with good lighting and the camera on a tripod it was easy to go through 9 of my lenses and adjust each one of them. I am absolutely thrilled with some of the lenses that I thought were not very good before. Every lens that I own (except for the 14-24/f2.8) needed some adjustment.
I don't want to compare FoCal with other software tools because I haven't tried any of them. What I can say is that it it has proved to be worth every penny and more to me.