stuck pixels on the sensor - Nikon D90

Rob 80386

Rob 80386

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hiya,

After about a year of ownership of the Nikon D90, today is the first time I've noticed a stuck pixel in every shot, it's stuck on green.

First of I thought it was dust and cleaned the sensor with the rocket blower and cleaned all of the lenses, to no avail.

Is their software available that can map out the sensor to clear the offending pixel or should I just use lightroom's RAW conversion, which maps it out anyways?



It may sound like i've answered my own question, just wondering whether i can fix the offending pixel in camera rather than relying on post processing to fix it.

:)


Kind regards

Rob 80386
 
There is software available online for some older Nikon bodies, but I'd imagine Nikon would probably remap it for you for free if the camera is still under warranty
 
Flash In The Pan said:
There is software available online for some older Nikon bodies, but I'd imagine Nikon would probably remap it for you for free if the camera is still under warranty
Click to expand...

Thanks for the quick reply :)

I may be out of luck in terms of the warranty, as i've had the camera for more than 12 months

however i will look for the software you speak of on the Nikon website

:)

cheers :thumbs:
 
Rob 80386 said:
Thanks for the quick reply :)

I may be out of luck in terms of the warranty, as i've had the camera for more than 12 months

however i will look for the software you speak of on the Nikon website

:)

cheers :thumbs:
Click to expand...

Did you register it for the 2nd year of warranty?
 
Quick update

I've configured my computer software to remove the stuck pixel, not going to send my camera of to Nikon, as doing so may cause other problems.

Even though the pixel appears on the camera, once I download the image to the computer it's gone.

:)
 
Sorry to hear about your stuck pixel :(
I was surprised to hear you mention about having to send your camera back to the manufacture, don't Nikon have menu based pixel mapping feature in their D-SLRs?
 
Hi Scott,

yes as you say my Pentax K-7 had it and so does my Oly D-SLR. I'm a bit surprised Nikon don't have it to be honest.
 
Rob 80386 said:
.

Even though the pixel appears on the camera, once I download the image to the computer it's gone.

:)
Click to expand...

Sounds like it is just the LCD display on the back of the camera that has the stuck pixel, and it is not on the sensor.
 
Martyn... said:
Sounds like it is just the LCD display on the back of the camera that has the stuck pixel, and it is not on the sensor.
Click to expand...

it's definately on the sensor, not the lcd because when you zoom in on a image on the camera, it appears as green spot that gets larger as you zoom in closer.

the computer maps it out for me when i download the image to lightroom.

i hope nikon take note and include pixel mapping on their menu system
 
My 5D2 had loads of hot pixels that dissapeared when opened in Cs4 using RAW format. I came to the conclusion there is mapping data attached to the raw file that maps them out of the picture too.

As I had to send my camera back due to a very intermittant fault on the rear screen I told Canon I wanted it sorting under the warrenty, thanfully it now has a new sensor with no stuck or hot pixels.

If you camera is out of warrenty you may get palputations at the cost of a new sensor :(
 
Martyn... said:
Sounds like it is just the LCD display on the back of the camera that has the stuck pixel, and it is not on the sensor.
Click to expand...

Good point Martyn, does the stuck pixel stay in the same spot even when you zoom in and pan around the exposure on the camera? Is it there in the menus etc?
 
martyp said:
Good point Martyn, does the stuck pixel stay in the same spot even when you zoom in and pan around the exposure on the camera? Is it there in the menus etc?
Click to expand...

no it moves around when you zoom and pan an image on the camera, but it is the same pixel everytime
 
ChrisH said:
My 5D2 had loads of hot pixels that dissapeared when opened in Cs4 using RAW format. I came to the conclusion there is mapping data attached to the raw file that maps them out of the picture too.

As I had to send my camera back due to a very intermittant fault on the rear screen I told Canon I wanted it sorting under the warrenty, thanfully it now has a new sensor with no stuck or hot pixels.

If you camera is out of warrenty you may get palputations at the cost of a new sensor :(
Click to expand...

Did they actually change the sensor or just map them out in camera?

All Focal Plane Array sensors have none-uniformities, hot-pixels, cold-pixels, stuck pixels etc. It is only the ones with large clusters in critical areas that end up in the reject bin. The rest are just mapped. However it is possible that over the life of the product others will fail and become noticeable. These can subsequently be mapped out, either by a user function on the camera or by a service centre using dedicated software. (Canons are also reputed to do it when you perform a manually actuated sensor cleaning cycle when you have a body cap attached).

ACR (& Lightroom) does a very good job of sorting them out automatically too. (They are often visible for a brief moment before a high res preview is rendered). There isn't anything embedded in the RAW file though.
 
ChrisJ

New sensor mate, there where 12 pixels in a cluster and 13 other single blue and red ones.

Thats above the permitted by EU regulations.

They had the camera open to do the rear screen so it probably wasn't much trouble to do both.

There are now no hot or stuck pixels even at a 120sec exposure.

I might get a few eventually but the camera is just 6 months old so I told them it had to be done under the warranty.
 
ChrisH said:
ChrisJ

New sensor mate, there where 12 pixels in a cluster and 13 other single blue and red ones.

Thats above the permitted by EU regulations.
Click to expand...

Aye, a cluster that big would be a bin job. The other 13 wouldn't have been a problem to map though. (Remember that they only appeared blue of green because of the Bayer filter).

ChrisH said:
They had the camera open to do the rear screen so it probably wasn't much trouble to do both.

There are now no hot or stuck pixels even at a 120sec exposure.

I might get a few eventually but the camera is just 6 months old so I told them it had to be done under the warranty.
Click to expand...

There will be some, I can guarantee that. Just they be mapped accordingly and dealt with in camera which is all that matters.

Sensor yield is such that a truly defect free sensor would be be phenomenally expensive.
 
Rob 80386 said:
it's definately on the sensor, not the lcd because when you zoom in on a image on the camera, it appears as green spot that gets larger as you zoom in closer.

the computer maps it out for me when i download the image to lightroom.

i hope nikon take note and include pixel mapping on their menu system
Click to expand...

OK it may just be stuck, there was a thread on FM where it was suggested that running the sensor cleaner a couple of times resolved the issue, read this thread , could be worth trying if it is stuck rather than dead.

LINK
 
Martyn... said:
OK it may just be stuck, there was a thread on FM where it was suggested that running the sensor cleaner a couple of times resolved the issue, read this thread , could be worth trying if it is stuck rather than dead.

LINK
Click to expand...


ok will do, cheers for the advice :thumbs:
 
Martyn... said:
OK it may just be stuck, there was a thread on FM where it was suggested that running the sensor cleaner a couple of times resolved the issue, read this thread , could be worth trying if it is stuck rather than dead.

LINK
Click to expand...
tied this didnt work on my d300 and i wont be sending it off to nikon as it will cost about £40 to post, not worth it for 1 pixel.
 
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