Wikipedia:Featured picture candidates/Vancouver, BC night panorama

Reason
A sharp, 9000 pixel wide panorama showing off the downtown buildings, bridges and stadium of Vancouver, BC at dusk against the mountain setting of the city with illuminated ski runs
Articles this image appears in
Vancouver, BC
Creator
Mfield
banding? I only see clouds. Mfield (talk) 15:24, 20 July 2008 (UTC)[reply]
It's not significant - in fact you only really notice it if you scroll through the pano (as I did) - you don't really see it if you just stare at it. The banding is a little more visible in this edit - as I say it's not significant but it's odd that only that section of the sky suffers from it and I was wondering if there was a particular reason. --Fir0002 00:10, 21 July 2008 (UTC)[reply]
You know what - i think it's rain. About 10 mins after shooting this and packing up and walking back across the bridge to my hotel, it started pouring with rain. Maybe its a front of rain moving in from the west. It sure isn't any kind of banding from exposure or blending. Mfield (talk) 00:40, 21 July 2008 (UTC) oops, didn't look at your edit before typing that, it sure is odd, maybe it somehow got introduced during the downsize as its not there in the full size original. When I get a minute I'll fix it anyway. Mfield (talk) 01:18, 21 July 2008 (UTC)[reply]
My guess is that its just the usual posterisation introduced by lifting extreme shadow detail slightly. It happens in horizontal/vertical bands because of the way the amplifier circuits work on the sensor, apparently. As Fir said, it isn't really visible unless you're scrolling (that said, how else do you view this image?), or looking for it specifically. Diliff | (Talk) (Contribs) 23:39, 21 July 2008 (UTC)[reply]
Ah, but this image hasn't received anything approaching an 'extreme' shadow lift at all - (apart from Fir's edit to show it up of course) and ISO100 on a 5D is pretty much noise free as you know, unless there was something that affected this one RAW frame, but i need to dig out the RAW files to check that. I agree it does look like sensor noise banding in this version of the image yet it's not apparent in the 40000 wide original, I am looking into whether something in the downsize caused these artifacts to become more prominent. Mfield (talk) 23:45, 21 July 2008 (UTC)[reply]
On the subject of the 100ISO noise, it's worth noting that by the 20th 6s exposure in a row (this was shot from right to left) the CMOS had warmed a fair degree and consequently noise would have risen. Its amazing how apparent this effect is, especially on astro sequences. Mfield (talk) 23:55, 21 July 2008 (UTC)[reply]