[RB (Andrew)]

Originally Posted by asimov

The vertical banding is rather obvious to me...But only if your looking for it.

Ah ok I see what you're talking about now.

Originally Posted by fringe_dweller

no I dont mind at all, wow! nice work RB!
I am guessing here/ but you have run it through a noise reduction proggy and giving it a darkframe?

Yes I ran it through Neat Image N/R.
I don't usually like using N/R software because it gives the images a "Plastic" look, but now and then I might.
No dark frame though, only you can apply that at the time of imaging so it's taken at the same ambient temp by the same camera.

Originally Posted by fringe_dweller

here is a cropped close up section of same pic, using jpg only and stretched and sharpened to bring it out hopefully (i did once think that it was a jpg issue, and tried a converted to 16bit TIFF of same pic, it definately reduces it (the banding), but its still there to a certain extent.)
the banding isnt full on obvious I guess, its bit faint, i should of said before, but its still there.
i appreciate you taking the time to help me out here Andrew! I wish it was all in my imagination

There's no advantage in converting from jpg to 16 bit Tiff because you can't add information/detail to it that's not already there. Shooting in jpg is not the best way to capture the maximum amount of detail, your best off shooting in RAW for most type of imaging.

I don't think there's too much to worry about Kearn.

Originally Posted by sejanus

vertical banding actually will happen in pretty much every digital camera under the sun if you push the sensor hard enough. Some are just less obvious than others

I agree with you, I think it's normal under these extreme conditions to see this with most/any DSLR.

Here's a shot I took in 2004 using the old trusty 300D.
Notice the severe amp glow !
This has improved with the new models (350D, 20D, 400D, 5D) considerably.
I've pushed the levels to reveal some horizontal banding. Doesn't bother me as the images it produces are fine.