Did SL2-S try to close and reopen shutter when being turned off?

[Stuart Richardson]

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Why do you care? It has zero effect on functionality...it only happens when the camera is turned off and takes about 5 seconds. It does this to prevent stuck pixels and things like pixel amp problems that cause lines in sensors. Nearly every digital camera I am aware of does this. In most cases they don't mention it or you may not notice. The only reason you notice in the SL is that the camera defaults to the shutter being open, and in order to ensure a completely black frame, it closes the shutter while it does it and opens it again after. The S cameras did this, and I believe the M cameras do too. My Sony cameras used to do it too. Before they did this you used to have to send the camera back to the factory to take care of these problems if they were bad enough. Clearly the engineers felt that it was something worth doing on a regular basis...so much so that you can even force it yourself if something comes up.

Edited March 26 by Stuart Richardson

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[Jonathan Levin]

Ifr I recall. back several years there was a method for taking a "black frame" and overlaying that black frame on an image in Photoshop and then selecting one of the Blend modes that would in turn conceal a latent pixel. I don't remember which Blend and I may be off on my info. I never tried that. On one of my older Nikon D cameras, I think there was also a way to create a "black frame" for this purpose as well. Someone will clarify this. Oh my memory.....but I still smell good.

[Elliot Harper]

1 hour ago, Stuart Richardson said:

Why do you care? It has zero effect on functionality...it only happens when the camera is turned off and takes about 5 seconds. It does this to prevent stuck pixels and things like pixel amp problems that cause lines in sensors. Nearly every digital camera I am aware of does this. In most cases they don't mention it or you may not notice. The only reason you notice in the SL is that the camera defaults to the shutter being open, and in order to ensure a completely black frame, it closes the shutter while it does it and opens it again after. The S cameras did this, and I believe the M cameras do too. My Sony cameras used to do it too. Before they did this you used to have to send the camera back to the factory to take care of these problems if they were bad enough. Clearly the engineers felt that it was something worth doing on a regular basis...so much so that you can even force it yourself if something comes up.

I have 3 M cameras M11, M10-R, M9, and as far as I know none of them doing this automatically, at least not I am aware of.

I have Nikon Zf, Fuji X-T5 and X-T50. None of them are doing this either.

 

[Photoworks]

3 hours ago, Jonathan Levin said:

Back on subject, do all the SL series cameras perform this pixel mapping, or did that start with a particular model?

pixel mapping was added in firmware on the SL2.

So that is already years ago.

Before you would give Leica to do it for you.

It is only needed when you see a problem.

Most software like capture one and lightroom do it too in raw files. it is done in the background.

[Stuart Richardson]

1 hour ago, Elliot Harper said:

I have 3 M cameras M11, M10-R, M9, and as far as I know none of them doing this automatically, at least not I am aware of.

I have Nikon Zf, Fuji X-T5 and X-T50. None of them are doing this either.

 

https://www.captureintegration.com/the-quick-fix-to-fujifilm-hot-pixels/

https://onlinemanual.nikonimglib.com/zf/en/sum_pixel_mapping_303.html

https://pixelsandfilm.com/pixel-mapping-for-leica-m/

Leica does it manually for M bodies (I have had to use it...wish it were in the menu. I thought they added it in the M10, but I guess I was mistaken. I had to do it several times with the M9 because of CCD lines). Sony and Leica do it automatically for their mirrorless cameras. Fuji and Nikon have menu options to do it (not sure if they also do it periodically). Bottom line, it is a standard and basic maintenance procedure. Sensors degrade over time as cosmic rays hit the pixels and overload them, and Leica probably figured they would save themselves the headache by enabling it by default as Sony does (they are Sony sensors, after all). The last thing Leica needs is a bigger line for their service department for something that is easily fixed in camera. Anyway, it just seems a strange thing to get bent out of shape about to me...

Edited March 26 by Stuart Richardson