ISO 640 / jpg, Sensor issues!! HELP!

[Marac]

Advertisement (gone after registration)

AGAIN!!!! just had a full dead line of pixels out on my first M240 and now this crap at ISO 640.

 

I have not tested it shooting DNG yet but I cannot understand WHY it is only doing this at ISO640.

 

Any help on this would be greatly appreciated.

 

Kindest Regards

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

[Marac]

Same with DNG, only at ISO 640.

I am a little bit upset to be honest, this is the 2nd M240 and they have both had issues.

 

I'm sure they will be very accommodating in their servicing of my machine but this leaves a very bitter taste in my mouth.

[woopie]

I realized... Not satisfied at all!!!

 

 

Sent from my iPad using Tapatalk

[tobey bilek]

Your concern is the light and dark areas on the floor? Almost double exposures.

 

This almost looks like a card problem. Get a different card and not a Sandisk as they are commonly counterfeited. They are top quality cards if real. If they came from Ebay or some "discount" source, who knows

 

I would get a new card and format in the 240. It almost looks as if the same storage locations are used for multiple parts of the image. I suspect the card directory which assigns storage locations is faulty.

 

I will also repeat my standard advice, never erase, only reformat the card as that clears the directory also.

 

Reformat in the computer, then again in the camera and repeat the test. If it fails again, try a new card formatted in the 240.

[mirekti]

Your concern is the light and dark areas on the floor? Almost double exposures.

 

I don't think his problem is with the floor. He only might want to throw the camera against it at this point in time.

..there is a vertical line in the photo.

[jip]

Needs sensor mapping,

 

Is it only at 640, or 640 and above?

[Marac]

Advertisement (gone after registration)

Needs sensor mapping,

 

Is it only at 640, or 640 and above?

 

So far it is only apparent at ISO 640, I will call Robert White on Monday and see what solutions they can offer, but this is already a replacement camera for one with a faulty sensor so this is getting a bit long.

 

I can ignore it and simply not shoot at ISO 640 but I would not be happy with that option. Of the Leica cameras I have owned (digital ones) the only one to NOT give me a problem was the Monochrom that I foolishly sold to fund an M240, my 2 M8's had lines on the sensor, my M9 Died, and so far 2 M240's have had issues with the sensor. as much as I do honestly love Leica I feel they really need to tighten up on their QC a wee bit, maybe.

 

I am, of cause, referring to the blue line that runs from top to bottom.

[jip]

I have not yet seen sensor flaws in my M240, but I will do a homogenous test at all ISO speeds. To see if I got any sensor flaws.

[Tonki-M]

ouch! ridiculous indeed. It's a shame really, Leica has such nice service, now all they need is some serious quality control; really unacceptable especially at the price range they are quoting.

[tobey bilek]

Sorry but I CAN not see lines that need remap. NO doubt they are there if others can see them.

 

Nikon seems to not have this or the camera fixes it automatically. Hint hint Leica.

 

This issue is keeping me from further investment in Leica.

[jaques]

Must be something wrong with your Monitor T as the line can be seen clearly running vertically top to bottom not quite two thirds of the way across the image. The line is green (ish)- and looks similar to some vertical lines I got on my M9 when using the Noctilux for some reason. I used to only get this issue just before the battery was about to die... but mine were vertical and probably different than what we see here.

[jaapv]

Quite visible on mine as well. As pixel defects can occur at any time an in-camera remapping setting could be quite useful. A number of point and shoots have such an item. Do any full-frame cameras offer this feature?

[Marac]

A built in remapped would be brilliant, I could use it on a monthly basis (sorry). well for now every ISO setting EXCEPT 640 is good my problem is only at 640 ISO and funny enough when I sort my photos by ISO in lightroom I have shot mostly at 640 ISO, I have only taken 300+ shots with this new replacement M and over half are at ISO 640, maybe I better start shooting lots at other ISO's to see if this is something that breaks down.

 

Thanks all for your support and just being able to tell people about it has calmed me down a lot I was honestly just shy of ripping heads off, it's getting ridiculous.

 

I will certainly keep everyone posted here about what happens. Robert White have EXCELLENT after sales service so I will see what they can do for me.

 

 

tobey bilek- the line is there on the right side of the crop picture I posted. I have another 160 examples I could post but people would start to hate my Photography even more if I did that

I will look for a clearer example if it would help.

[tundraline]

Quite visible on mine as well. As pixel defects can occur at any time an in-camera remapping setting could be quite useful. A number of point and shoots have such an item. Do any full-frame cameras offer this feature?

 

It is my understanding that pixel remapping/pixel elimination algorithms loaded into on-board processors are employed not only in many point-and-shoot cameras, but in most (and probably all) high-end Japanese cameras with full frame sensors (e.g., Nikon, Sony and Canon). I can't imagine that a pixel remapping algorithm would be very hard to write and implement in an M240 firmware update. I don't know the particulars of the Maestro processor and its capabilities, but this processor already does a lot more hefty signal processing chores than pixel remapping would likely require.

[jip]

But you wouldn't want it to just do it... maybe your camera would have 6 dead lines, meaning you would have lost LOTS of actual pixels.

[tundraline]

But you wouldn't want it to just do it... maybe your camera would have 6 dead lines, meaning you would have lost LOTS of actual pixels.

 

My understanding (which may be incorrect) of the way this works is that for some reason a single bad pixel can cause a cascade effect in all the pixels below it, which then produces the vertical lines noted above. In most cases identifying the bad pixel, and then preventing that bad pixel from providing an output (or discarding or ignoring its output), would result in the elimination of the one bad pixel from the resulting image, and not in the elimination of a whole line of pixels. I will speculate that pretty much the same signal processing method is already occurring in the maestro processor with dark frame image processing to reduce or eliminate thermal sensor noise from long exposure time images taken at high ISOs under dark or nighttime conditions. Pixels that have high levels of thermal noise are eliminated from the resulting image through Leica's dark frame image processing techniques. Such high thermal noise pixels occur on a fairly random basis in almost all camera sensors, as do bad or hot pixels. Dark frame image processing is also a standard digital signal processing technique employed in just about all modern digital cameras. Another way to attack the problem might be to prevent or inhibit the bad pixel cascading effect, which might be possible in firmware (as opposed to identifying bad pixels and then preventing their outputs from affecting resulting images). Whatever the case, it seems pretty evident that the bad pixel problem is begging for a quick firmware solution from Leica.

[Berlinman]

Hi, I had the same problem with my M240. The Leica service fixed the problem. They told me, the problem is one dead pixel. The point, I don't understand, is why it only appears at ISO640. I'm waiting for a firmware with an automatic pixel mapping.

[tundraline]

But you wouldn't want it to just do it... maybe your camera would have 6 dead lines, meaning you would have lost LOTS of actual pixels.

 

Nice Flickr photo album, Jip. Thank you. My family and I used to live in Maastricht. We miss the Netherlands.

[tundraline]

Here's a software fix for stuck or dead pixels: Pixel Fixer | Hot pixel removal utility Supposed to work on the M9 and M8. M240 not listed.

[Advertisement]

Hallo,

Look here: Leica M

[neli]

hi

That really sucks and I feel for you.

Have you had a look at the sensor with a lighted magnifier thingy? Sorry, the name eludes me. One of my M9's was scheduled for a sensor replacement according to Leica reps here in Switzerland and I saw some dead pixels like you are seeing at F4 and above and above certain ISO's, I don't recall but it may have been 1250, one I didn't use that often. When I checked the sensor with a magnifier it looked broken, like the glass was coming off the sensor. When I double checked there was a small piece of lint or something stuck down the side of the sensor , really tiny, it reflected silver in the magnifier that's why I noticed it. I cleaned the sensor again, my rationale was, well if it's gonna get replaced I can't really do much wrong, using sensor swabs and quite a copious amount of cleaning fluid. I placed the camera at an angle so the liquid flowed in the direction of the dirty lint and the liquid must have removed that sliver. After that the sensor glass looked fine, lint was gone as far as I could tell, must have been just oil and gunge from somewhere, and the pictures were then fine. I kept using the camera and the next 5000 odd exposures were fine and now the camera is sold, but I haven't heard anything from the new owner, whom I made aware of the procedure.

Long story short, have a really good look at the sensor because it may be some piece of something causing interference. That said I have zero understanding about sensor magic and such things. Maybe I got lucky, and cleaning had nothing to do with it. Good luck in any case. Maybe it helps a little.