White spots on pictures.

[snappit]

Hi All.

I was wondering if someone could help with this. As you can see in the picture, there are several white spots. Does anyone know what may be causing this? They are not in most of the pictures I took today, either before or after this. This is a cropped part of the picture to show the spots up. I was a long way from the horse and my settings for information were 500mm, 1/2000 sec, auto ISO 2000. Canon R6 Mk 2, lens RF 100-500. I was using a high shutter speed because there was a lot of movement of the horses. It was bright sunshine. The exposure was fine. The lens seems clean. I have never noticed this before, but I am a bit concerned. Thanks for your help. I will be popping out to do some test shots, but I welcome your input.
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[cuthbert]

They are hot pixels - I’ve got an r6ii and I get them at high iso and particularly when the camera is warm. I’ve seen this problem crop up a fair bit and seems to be common phenomenon with modern Canon sensors.

I’d say like you, I start to see them at around 2000 iso and they increase the higher I go.

A sprinkling of hot pixels at high ISO is to be expected to some degree, annoying, but easily cloned out.

Some people report success with the old remap trick of taking the lens off, putting the body cap on and then running the manual sensor clean function (the mode for manually cleaning the sensor) and then just leaving it for a couple of minutes. I’ve done that a few times with mine and it makes some difference but doesn’t get rid of them completely.

 

[Gav.]

They look like flies to me.

 

[Phil V]

They look like flies to me.

This and / or seeds in the wind

 

[cuthbert]

I’ve looked at this on a bigger screen and it could indeed be environmental as suggested, but if not, then the hot pixels are the next option to explore. A good way of doing this is to set the iso to 3200 and take a long exposure picture with the lens cap on and if you see white dots in similar places to your pic, then they could be the culprit. I find the single little white ones do come and go, with a couple of brighter ones that appear fairly consistently at high iso

 

[snappit]

Thank you all for your replies, they have been very helpful.

 

[Dave Goodier]

Flies and or seeds - hot pixels are usually tiny and pure white, they are also 'sharp' as if in good focus regardless of what the lens captures

 

[swanseamale47]

I've had the odd hot pixle, but never like that, I mostly get them in long exposures, cant say I've noticed shooting high ISO. I'd do as suggest already and test it. Maybe a plain dark background with the same settings and lens.

 

[DemiLion]

Environmental - either flies or seeds. My guess would be seeds looking at the field.

Nothing to do with the camera.