Originally posted by Tim A Can you give me a link to a proper test chart?
Adam, I hope I was not being unreasonable with this request. I should have been more clear, because I can find focus charts by doing a Google search, but they come in lots of flavors. I was more wanting to know which chart you thought I could use to properly evaluate my lens.
CRIS has told me the lens meets Pentax specifications and from what I hear specs for lenses can have substanial tolerances, especially wide angle lenses like mine. It is obvious I am going to have to return the lens at my expense. I have already paid for one round trip. While I still have the lens, though, to work with I would like to have some result that would be convincing to show them. I gather you might have such a test in mind, but I don't know what it is. I have taken many photos, but none of them show anything that is not in the two I have posted here.
The decentering test showed the lens is not decentered and the focus always seems to be good except for the one area that is always less focused than the rest.