[...] > >>> >> > >>>>> >>>> Not so sure about this one. Any thoughts? > >>>>> >>>> > >>>>> >>>> http://knarfinthecity.blogspot.com/2011/01/into-mist.html > >>>>> >>>> > >>>>> >>>> thanks, frank [...] > > > > "scallopy edges in several concentric waves" sounds like the kind of > banding I often see in a digital image of the sky around a blown > highlight. > > Here's an extreme example of what I mean: > > http://static.photo.net/attachments/bboard/00V/00VlQe-220307684.jpg > > Deliberately extreme I think to illustrate the effect. > > I'm sure there's a good scientific explanation for why it occurs, but I > think it's because digital is only capable of discrete levels. There > are > not enough discrete levels in 8 bits to display extreme contrast; > there's no in-between like there is with analog. > > When the patterning is that extreme it will show up in prints. > > But prints are to some extent analog because ink drops or dyes tend to > spread a little bit and you do get some in-between levels. And if the > banding is not severe the spread of ink/dye may mask it. > > So, I guess what I'm trying to say is I think the moire will show up > *more* on a monitor than it will on a print. > > Usual caveats apply - wont be the first time I've munged it up.
I think this is something to do with the video card or the monitor. I don't see the banding on this photo, but on a machine I used to use it would sometimes happen that I would put a photo on the screen and see no banding, but if it stayed up there a while the banding would appear, as if the monitor or card realised nothing was changing, and cut down on the refresh somehow. If I refreshed it manually the banding would disappear. B -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
