Hi Butch. Finally someone who believes me and has seen the effect before!
Butch Black wrote: > > I took a bunch of film (Pentax MG) from my vacation trip to the local > > photo shop, and asked for a set of prints plus a Photo CD so I could put > > some online. > > Looking closely at the prints, most of them have almost exactly those > > background marks, all over it. I mis-spoke. The marks are on the CD images, not the prints. > > Who can tell me what causes these marks? > > Keith, does it look like a blocky mosaic? Yes it does. That pretty well describes it. I couldn't come up with the mental image, but that about does it. Not just one shot. All of them had it. The 4x6" prints from the film did not have it. The images on the CD did... I used Kodak Royal 200 and 400, which is pretty high definition film. In fact, I look at some of my images with a 10X Coddington loupe, and the film is clean as can be. > I had problems with a local Wal-Mart's picture CD having a look like > blocky mosaic grain. That may well be the problem. These were like you took a very small rake and made very faint, almost square marks across the lower light level areas. I only noticed it when I cranked up the image size a little in my computer. > They were > using a fairly new Fuji Frontier system. I don't get that effect from other > machines including a Frontier used in a high end minilab, so my guess is > that they have something set or adjusted wrong. If there is another lab that > offers CD's in your area try a roll with them. If you don't get the same > results then it's the labs fault. > > Butch I'll try that! Thanks again for identifying the probably cause! keith whaley
