"Geoff J" wrote in message
Incidentally here’s another pixentral link:
http://www.pixentral.com/show.php?picture=1IJY1U6RghQ93Tor2B Uu5aIYS3VSb1
Note the concentric rings on the wall behind the tree.
The appearnce of these things is almost like Newton’s Rings from my old film days — although caused by totally different reasons.
Pat, I’ve quickly saved a file twice, one high compression, one low. This is exagerated but it shows my point. Take a look, see how the background goes blocky in the high compression jpg? The low one is fairly smooth. http://www.gjphotographic.co.uk/test/test1_low.jpg
http://www.gjphotographic.co.uk/test/test1_high.jpg
Well I see your point. My only questions are 1) is converting from RAW/NEF a form of "saving"?, and 2) if so, how can I regulate or choose the saving compression at that stage (since I’ve never opted to do that — high or low — in my life prior to now, and 3) how come I’ve never seen the phenomonon before?
If I’ve been doing it wrong all along I should have been getting lousy results for the past several years but I haven’t. Indeed my results are generally regarded as excellent.
It still seems as though something has changed.
Nonetheless your two examples above are duly noted and somehow may figure into a solution for this.
Thanks again Geoff.
—
Pat Durkin
email: t o b a c c o h a t e r 1 @ y a h o o . c o m
PS – One other example to illustrate what I mean when I say by my statements that I have not had this problem before:
http://www.pixentral.com/show.php?picture=1yEenMlWtT4evTgLcs grhkeTWIMDd0 Please note that in this old Packard automobile there is a smooth transition from high to low tones in all the color ranges in the entire photograph. And there are no blocks or clumps of pixels. The picture was made a day or two before I began having the current problem — while using the exact same methods. If my methods were faulty, why did I get such an acceptable result? How, if I didn’t change anything, was that possible on a consistent day-after-day, month-after-month basis? I’m not without experience in PS and I am confused right now.