I wonder what causes this: every once in a while this "noise" shows up in a frame or two. I use a canon 5dmk 4 and a mk3 as well. i used to think it was an artifact from the sd card...

gekko11 Loc: Las Cruces NM

every once in a while this "noise" shows up in a frame or two. I use a canon 5dmk 4 and a mk3 as well. i used to think it was an artifact from the sd card but it seems to occur regardless of which card i use... it only seems to occur when shot in jpeg not raw. just wondering if anyone else has had this problem

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rmalarz Loc: Tempe, Arizona

That is an exceptional lightning photo, The square towards the center is a real mystery. However, there are a few questions. The answers to which may lead to a solution.

Is this a timed photo? That is did you leave the shutter open for a lengthy time to capture this image?
--Bob

gekko11 wrote:

every once in a while this "noise" shows up in a frame or two. I use a canon 5dmk 4 and a mk3 as well. i used to think it was an artifact from the sd card but it seems to occur regardless of which card i use... it only seems to occur when shot in jpeg not raw. just wondering if anyone else has had this problem

TheShoe Loc: Lacey, WA

Since it only occurs in JPEG and not Raw, you may have already answered the question. If you export the Raw as a JPEG, does it happen? You may need to try several different qualities of JPEG to determine the answer to that. It may be because of the particular compression algorithm used by your camera when creating the file.

gekko11 Loc: Las Cruces NM

Thank you Bob, the details are 1/100 sec @ 105mm f11 iso 1600

rmalarz Loc: Tempe, Arizona

During the exposure, do you have your eye to the viewfinder?
--Bob

gekko11 wrote:

Thank you Bob, the details are 1/100 sec @ 105mm f11 iso 1600

gekko11 Loc: Las Cruces NM

TheShoe wrote:

Since it only occurs in JPEG and not Raw, you may have already answered the question. If you export the Raw as a JPEG, does it happen? You may need to try several different qualities of JPEG to determine the answer to that. It may be because of the particular compression algorithm used by your camera when creating the file.

Hhmm, you might be on to it, I went back to Photos to check and found that this particular shot was Raw + Jpeg... the raw file does not have the artifact, the jpeg does.

Pistnbroke Loc: UK

If its the square you are on about you shot it thro a window and that whats on the back wall.

gekko11 Loc: Las Cruces NM

rmalarz wrote:

During the exposure, do you have your eye to the viewfinder?
--Bob

No , when shooting lightning I set up my shot on tripod , try to anticipate where , set the exposure and take alot of frames, the viewfinder is covered

gekko11 Loc: Las Cruces NM

Pistnbroke wrote:

If its the square you are on about you shot it thro a window and that whats on the back wall.

yes , its the pixelated square in the center and a few more artifacts towards the rt top of photo that I am on about. Did not shoot through a window,, out in the wild away from anything save jackrabbits and sagebrush!

Pistnbroke Loc: UK

did you shoot thro a window?

gekko11 Loc: Las Cruces NM

Pistnbroke wrote:

did you shoot thro a window?

Nope , no window

rmalarz Loc: Tempe, Arizona

Well, that eliminates my guess. I thought this might be light entering the camera through the viewfinder. But, if you have it covered or closed that eliminates that guess.
--Bob

gekko11 wrote:

No , when shooting lightning I set up my shot on tripod , try to anticipate where , set the exposure and take alot of frames, the viewfinder is covered

Pistnbroke Loc: UK

If you zoom in on the square there seems to be numbers ..is that the clue

gekko11 Loc: Las Cruces NM

Pistnbroke wrote:

If you zoom in on the square there seems to be numbers ..is that the clue

IDK Pistnbroke, i think i see fragments of other photos in those little squares,,,

Pistnbroke Loc: UK

reformat the card in your computer and do a full format not quick.