How to check that replacement sensor in MM9 is ok?

[SYD_TRIBE]

Hi all

I should get my Monochrom (MM9 version) back from Leica’s Australian agent with a new sensor in the next few days. The original sensor was corroded.

I’ve asked them if the replacement is the old generation CCD sensor or new generation and am waiting on their reply. I guess old generation since I haven’t read anything about the new generation sensor being available to the general public.

Since this is the 2nd time I’ve had to send my camera in (1st time was for pixel remapping), I want to check it for any possible sensor related issues when I get it back, rather than discover any issues when reviewing my photos.

How to do this? Take a photo at each ISO setting at certain apertures? Or take a photo at each aperture at certain ISOs? Should the photo be of a black or white scene?

Thanks in advance

 

[jaapv]

It won't be the new cover glass, that is still in the R&D stage. If you insist on checking, use a even grey surface at all ISO settings with the lens defocused.

 

[Huss]

Take a shot of the sky during daytime at infinity with the lens stopped down to f16.

That's how I could clearly see all the junk on my M-E (dearly departed).

Here's the thing, even though they replaced the sensor you may still see dust spots. Even on a new sensor. So don't confuse that with a sensor issue. Dust happens.

 

[TR3B]

What would be the difference, if any, between the two tests in determining dust or corrosion?

 

[jaapv]

The second shows up dust, the first sensor defects.

 

[willie_901]

How does ISO (increasing gain after the shutter closes) impact the ability to detect corrosion artifacts?

 

[Huss]

The second shows up dust, the first sensor defects.

The 'dust' method is how I saw my sensor corrosion. Hundreds of dust like spots.

 

[SYD_TRIBE]

Thanks all for your feedback so far. The Leica Australia agent indeed confirmed my sensor is the old generation. To be honest, I'm just glad to have it back. I'll try your idea's out.