HDR w/ Canon 7D - Banding in Sky

So i have been shooting HDR primarily with my Canon 5D2 over the years. Well i wanted to test out an Ultra wide and see what i thought of it. So i ordered the Sigma 8-16mm "non" fisheye to go on my crop body 7D that hasn't been getting much use lately. FF that should get me somewhere around 12-24mm give or take.

I have been shooting in a lot of different conditions and after processing a few from the 7D i have noticed in contrasty scenes that the sky had vertical lines across it. Changing lenses does not make a difference, i have the Canon 8-15mm fisheye and got the same results with it mounted to the 7D. Went back and shot a few with my 5D2 and used the same process technique and no issues with banding in the sky.

All images were shot at -2, 0, +2 / on a tripod and used the self timer.

My question, Is the 7D not capable of these style images in HDR? am i doing something wrong here?

IMAGE LINK: https://www.flickr.com …woodallphoto/15​842702978/

The College

The only other thing I would try would be to use a longer lens, such as the 24-105 and see if it continues.
If it does, I would say its in your processing thats causing the problems.

What program are you using to process your HDR images ?

I have two 7Ds and use a Canon 10-22mm lens on both, process them in Photomatix Pro, and have never had a problem with banding.


On closer inspection of those images, it looks like streak marks from the liquid used to clean your sensor,,,, is that possible ?

these were done with photomatix also. here is a screen shot with the built in profile using monochrome preset

Does the original image (single shot), have the same streaks in it ?

no i can't see it in the original shot. i mean i guess i could tamper with it in LR and get it to show.

Well, if its not on the original, and its not residue on the camera sensor, then my guess is something your doing differently in Lightroom.
Why not bypass Lightroom and instead process them in Photo Shop, or send them directly to Photomatix with out processing them to see if there is a difference.

well that is directly imported to photomatix.

Ive run out of suggestions at the moment,,,,,,, maybe someone else can solve the problem.

Looks like classic Canon sensor banding.

My guess is that these noise artifacts are only coming from the underexposed brackets. Have a look at the underexposed raw brackets in LR and push the shadows slider all the way up to see the banding (if it's still too dark, then move the exposure slider up as well). Then use noise reduction until the banding goes away. Return the shadow slider back default and export to Photomatix. You should only need to do it on the darkest exposures.

Topaz has a denoising plugin for Photoshop that actually includes a de-banding routine. It could be an option if LR noise reduction isn't sufficient.

David Arbogast wrote in post #17335980
Looks like classic Canon sensor banding.

That was my first thought, but I wonder if it is fine enough for that - I would check by bringing out the banding on one of the originals. Also the 5DII has about the same level of banding at ISO100 as the 7D.

I must admit I don't tend to push my PP as much as this though.