I did a little test a few years ago using several f1.4 lenses (faster lenses seem to amplify this problem). All of the tested lenses (2 from Pentax, 1 from Nikon) showed the ghost when the filter was applied and did not show the ghost when the filter was removed. I did not have access to any Pentax filters for the test, but the Nikon filter I used showed less ghost than the Hoya filters. These are just my personal findings - I am not a certified lens technician, nor do I play one on TV.
Dave -----Original Message----- From: Andre Langevin [mailto:[EMAIL PROTECTED] Sent: Friday, October 29, 2004 3:18 PM To: [EMAIL PROTECTED] Subject: RE: Is Tamron 28-75mm better than Pentax 24-90mm? What I don't know is: will "no-filter" also give ghost images? If not, no filter is better than UV filter. Especially since UV filtering is no longer necessary with modern multi-coatings.
