Anyway to remap sensor to rid hot pixels?

[paul chiu]

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Just received a new M240 and shot with Noctilux. Noticed some bright spots even at F0.95. Strangely, not at smaller apertures or video.

 

Is there some method any of you tried to remap the sensors? I know Panasonic has remap functions in the GH series of cameras.

 

Thanks.

 

 

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[jdlaing]

Just received a new M240 and shot with Noctilux. Noticed some bright spots even at F0.95. Strangely, not at smaller apertures or video.

 

Is there some method any of you tried to remap the sensors? I know Panasonic has remap functions in the GH series of cameras.

 

Thanks.

 

 

 

No sir. It must be done by Leica.

[bocaburger]

I hope someday Leica decides we users are capable enough to handle a remapping utility, just as they eventually acquiesced to us being capable of handling a lens-ID menu.

 

But evidently LR maps out misbehaving pixels as long as you shoot DNG.

[jaapv]

The problem with remapping is the tolerance.

Each manufacturer has a limit percentage beyond which the sensor must be replaced instead of (re)mapped. This tolerance span is quite small with Leica, witness the sensors that are replaced instead of remapped.

For that reason there is little point in implementing a self-remap facility. The camera would return a "replace sensor" message too often.

[bocaburger]

The only time I've ever read of Leica replacing a sensor vs remapping was if there was a line of dead pixels. There are 24 million pixels on the M240's sensor. I seriously can't buy that Leica's tolerances are so thin to preclude mapping out a dozen or so dead/stuck pixels which might appear in several years' use.

[paul chiu]

Hi all,

 

thanks for all the great replies.

I spoke to my Leica dealer today and he is ready to send me a new replacement for mine.

The issue is that the ones he has were of similar date and serial numbers. All back in Feb 2014.

 

Should I take the replacement or wait?

[jaapv]

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The only time I've ever read of Leica replacing a sensor vs remapping was if there was a line of dead pixels. There are 24 million pixels on the M240's sensor. I seriously can't buy that Leica's tolerances are so thin to preclude mapping out a dozen or so dead/stuck pixels which might appear in several years' use.

 

Don't forget the sensor is mapped at the time of assembly. The pixel defects in use come on top of that. We have no idea how close a sensor was to the tolerance limit in the first place.

[jaapv]

Hi all,

 

thanks for all the great replies.

I spoke to my Leica dealer today and he is ready to send me a new replacement for mine.

The issue is that the ones he has were of similar date and serial numbers. All back in Feb 2014.

 

Should I take the replacement or wait?

Of course you should take the replacement as date and serial number have no predictive value.

[bocaburger]

Don't forget the sensor is mapped at the time of assembly. The pixel defects in use come on top of that. We have no idea how close a sensor was to the tolerance limit in the first place.

 

Well if Leica's tolerances are so tight that the customer mapping out a few dozen of them is to be forbidden, then shouldn't we assume Leica's tolerances are so tight they would not let pass a sensor so close to the limit that a few dozen bad pixels would precipitate the need for replacement?

[paul chiu]

Ok, dealer ordered a new one from Leica in NY.

They will ship to me (try to) before i travel to shanghai Saturday,

Thanks jaapv

 

Of course you should take the replacement as date and serial number have no predictive value.

[carneiro]

I had a phone call with the Leica support because my summilux asph 50 is being adjusted. We also spoke about dead pixels and he said that they are discussing the solution that is already being used for S cameras. As far as I understood the user will have to send in a card with picture with hot pixels. He receives back a card with a "mapped" picture that can somehow be read by the camera. He did not say when this will be available.

[jaapv]

Well if Leica's tolerances are so tight that the customer mapping out a few dozen of them is to be forbidden, then shouldn't we assume Leica's tolerances are so tight they would not let pass a sensor so close to the limit that a few dozen bad pixels would precipitate the need for replacement?

 

That would just mean lowering the tolerance limit, an argument ad infinitum.

[bocaburger]

Just the opposite, it means Leica might need to raise their tolerances for how many pixels they map out before declaring a sensor unfit for placement in a new camera.