Very Visible Uniform Grid in 7D Sky Shots

Does it happen with JPEGS as well?

Do the JPEGs & Raws SOOC of the same image both show it? Are you doing *any* processing on either?

I believe this might answer that:

BuckSkin wrote in post #19319244
I use DxO for initial RAW editing and conversion; just to eliminate the possibility, I checked their grid, but it does not match what I am getting.

TeamSpeed wrote in post #19319396
That is truly odd, I have never seen anything quite like that before at least on this forum and FredMiranda. Happens with any lens I assume...?

I have tried three different lenses and all exhibit the problem; 18-55mm "kit" lens, 18-250mm Sigma, and 50-500mm Sigma.

duckster wrote in post #19319406
Does it happen with JPEGS as well?

Yes

dangermoney wrote in post #19319410
Do the JPEGs & Raws SOOC of the same image both show it? Are you doing *any* processing on either?

SOOC, if I look close, I can see the grid; further processing really brings it out.

Maybe because it is more of an expanse of an unbroken area and a lighter color, it really shows up in areas of sky.

I figure it is there even in very busy parts of an image, just not so noticeable.

Does the pattern also show up in LiveView ?

BuckSkin wrote in post #19319435
Yes

If it happens with JPEGs produced in camera, too, then it's not the DxO RAW processing causing the issue.