Quote Originally Posted by conropl View Post
Bob:

I do not have the 500, but I did use this with my 100-400 and the results matched my manual method. A couple of suggestions:
  • They suggest printing the target at 300dpi. On my printer that did not look good so I printed at 600dpi which was way better.
  • Make sure the paper and ink is not reflective, and make sure your lighting is consistant throughout the test (clouds moving in and out is not good).
  • I know you are supposed to be 50 time the focal length for optimal testing, but you would be better off at the distance most shot from. Aslo, when I did my manual testing, I did it at the recomeneded distance and came up with an adjustment of +5. Then using the FoCal at a much closer distance (about 8 meters) I got the same results several times in a row. I guess I would suggest a shorter target distance. That is not normal practice, but it seemed to give me expected results.
  • Did you turn off IS? If you did not, then that would make your live view drift in and out (FoCal suggests it be turned off).
Pat
Pat, I will try another reprint as you suggested, I also checked and did everything else you mentioned. I was also haveing the same problem with my 100-400@400. I may also try shooting from the counter top for a little more stability.

Thanks