5D4: Canon has not solved the banding problem

[dreed]

Playing around with a sunset shot that I took recently to try not get a bit white splodge, I shot at 1/4000, f/8 (-2EV) and what do I find?

Down at the very bottom of the image a purple band that spans the entire image on top of a green band that spans the entire image. (processed with LR 8.1)

No this isn't intended to be a "final image", I was just playing around with settings to see what was possible with this image (likely end result is trash.)

[BernardLanguillier]

Can’t see it, where exactly is it?

Cheers,
Bernard

[Rhossydd]

Can’t see it,

Nor can I.

Without knowing how a file has been post processed one single jpg is meaningless.

[kers]

i only see jpeg artifacts...

[BobShaw]

Sunset or sunrise is when the top of the sun crosses the horizon.
This is not -2EV near the big white blob. It is massively overexposed and you are probably just looking at flare.
You can possibly damage the sensor.

[Kirk_C]

Can’t see it, where exactly is it?

Oh good I'm not the only one who can't see it.

[dreed]

Oh good I'm not the only one who can't see it.

Ok, this is really hard to demonstrate. Harder than I imagined.

* on sRGB it isn't easy to easy but on a wide gamut monitor, it looks awful
* attachments are limited to 4MB making TIFF hard to do (but I've done so - 100% crop of the very bottom)

[smahn]

Don't know what's causing it but I can recommend an easy fix if you have Photoshop or similar.

Create a blank layer above set to color mode. Use a large soft clone brush and clone over the green band with colors from above. It'll retain all that purple/green/blue color variability in the peaks and valleys of the waves.