Modification at opening state

Processing
1

Hi eveybody,

I’m quite new on RawTherapy, and I don’t understand technical photography words (specially in english).
I have several pictures of the sun. Taking this pictures I added a filter on my canon camera. So my “sky” is black and the sun is still a bit too much lighty.
I want to denoise this pictures using RawTherapy, and for all pictures it is ok except one…When I try to open it, the picture is covered by a matrix of several color RGB completely (even the sun). I don’t know what it is, and it can’t come from my camera, there would be no explanation just for this picture. Do you know how to avoid it?

Thank you

2

Can you provide a screenshot to show what you mean? You can just grab a screenshot and drag & drop the image onto the post editor when writing a post. It will auto-upload and insert it into your post (don’t make the file size too large).

3

Thanks for the reply.

Following the picture of the explorer:

887×320 17.3 KB

The picture concerned is IMG_7862. As you see, it is like the other. But when I open it with RawTherapy… this is what it shows:

1578×733 401 KB
?

Can you explain it? Thank you

4

It’s underexposed by 7.5 stops. That leads to the noise you see.

Edit: I don’t know whether it’s underexposed by exactly 7.5 stops but at least RT corrects it by 7.5 stops, which means the noise will be amplified a lot.

5

Thanks, Yes, that what I see, even if that makes no sense at all, cause it was shot in the same condition than the others…But ok, now how do I get my black sky and my normal sun to work on it?

Edit: ok I just found the exposure compensation button;

Ok thank you, that solves my issue!

6

@fabdu92 Can you share this raw file by uploading it to filebin.net and post the link here? Then I can have a look why RT auto exposure failes for this file and probably fix it. If you could share one of the raw files where RT does not fail that would be even better.

Ingo