Glitchy Images From My D750
- Thread starter faberoptic
- Start date
pawel zygmunt
New member
Yeah but what if I want to have my photos underexposed? for sunests you have to underexpose for better colors ant those the lines are horrible. It shouldn't be like that. I had camera for 400 Euro and none of them issues 
pawel zygmunt
New member
Question; are those day-time shots that you deliberately underexposed to simulate night shots?
No it was one of the test shots just to show you what is going on
No
it was one of the test shots just to show you what is going on
Yeah but what if I want to have my photos underexposed? for sunests you have to underexpose for better colors ant those the lines are horrible. It shouldn't be like that. I had camera for 400 Euro and none of them issues
What you're doing is exposing to the left while having a scene that has enough dynamic range to utilise the full range of your cam. Something is being compressed because of that. If I look at your individual color channels I see the issue clearly:
As shot (R-G-B channel):
Exposure increased:
As you see the data that is affected remains affected.
If instead of starving the sensor you expose normally and lower the exposure in post, you'll likely won't suffer this issue and still get the same result.
pawel zygmunt
New member
Are you sure ? So problem is correct exposure? But on the photo with Mountain I exposed correctly and when I wanted to bring it down a bit lines and patches came back
pawel zygmunt
New member
I wasn't exposing to the left. Left side is west so this is were the most of the light was left on the right (east was nearly darkness)
Horoscope Fish
Senior Member
He doesn't mean left/right as in east/west, he's referring to the histograms which are shifted heavily to the left. In short, think he's right, your issue is exposure related.
Reading this tutorial should help: Understanding Histograms. It will explain what Histograms are and how you can use them to keep issues like this from happening in the future.
.....
I measured RGB levels in the picture J-see analysed in post #84. The blue level varies from about 7 in the top-right corner to about 20 in the middle. Hence, there are only about 13 discrete levels of blue across half of the image. If you increase brightness/contrast, you will bring these discrete levels up and they become visible as banding.
There is nothing wrong with your camera, you've just reached the limits of digital photography.
There is nothing wrong with your camera, you've just reached the limits of digital photography.
pawel zygmunt
New member
Like I said I used those photo just to show clearly the issue. Thx for your help lads. Camera is going back to shop anyway. My old Nikon D200 never did anything like that to me
There is another recall: [h=3]D750 Service Advisory
Issue regarding shading in images[/h] It does not sound like your issue but in case you want to check:
https://support.nikonusa.com/app/_D750/sn
Issue regarding shading in images[/h] It does not sound like your issue but in case you want to check:
https://support.nikonusa.com/app/_D750/sn
pawel zygmunt
New member
Thx. I checked already. It's shading free
pawel zygmunt
New member
Hi. Just to let you know I got message from repair centre about my problem and it's absolutely camera's fault. I was told that files getting digitally corrupted when saved on camera. Some part was ordered already. I will post more info when I get tech report