Faulty CCD

[Guest]

Archived from groups: free.uk.photographic.equipment.digital,free.uk.photography,alt.comp.devices.digital-cameras,alt.comp.periphs.dcameras (More info?)

I have a Sony DSC 85. I have recently noticed one white pixel in the
images which is always in the same place so its a faulty pixel on the CCD.

I have a couple of questions:

1) Is this sort of fault to be expected if it is litterally one or two
pixels (as it is with TFTs)? Or is this an early sign that the CCD is
beginning to fail?
2) Are CCDs difficult to replace? Where is a good place to find
replacements?
3) Is there any free software that can touch up these dropped pixels
without damaging the rest of the picture?

Many thanks in advance,

Tony.

 

[Marvin]

Archived from groups: free.uk.photographic.equipment.digital,free.uk.photography,alt.comp.devices.digital-cameras,alt.comp.periphs.dcameras (More info?)

Anthony Edward Cooper wrote:
> I have a Sony DSC 85. I have recently noticed one white pixel in the
> images which is always in the same place so its a faulty pixel on the CCD.
>
> I have a couple of questions:
>
> 1) Is this sort of fault to be expected if it is litterally one or two
> pixels (as it is with TFTs)? Or is this an early sign that the CCD is
> beginning to fail?

It may be a new phenomenon, in which case it is some damage, which probably won't spread.
Have you looked ta some pix from when the camera was new? You may have been not noticing.

> 2) Are CCDs difficult to replace? Where is a good place to find
> replacements?

Depends on how handy you are, and whether you are willing to risk wrecking the camera.
And how you can get a replacement CCD. If the camera is a ocuple of years old, it
probably isn't worth repairing. You could buy a used camera like it for less money.

> 3) Is there any free software that can touch up these dropped pixels
> without damaging the rest of the picture?

In-camera software does this, ordinarily.

>
> Many thanks in advance,
>
> Tony.

 

[Guest]

Archived from groups: free.uk.photographic.equipment.digital,free.uk.photography,alt.comp.devices.digital-cameras,alt.comp.periphs.dcameras (More info?)

Marvin wrote:

> Anthony Edward Cooper wrote:
>
>> I have a Sony DSC 85. I have recently noticed one white pixel in
>> the images which is always in the same place so its a faulty pixel on
>> the CCD.
>>
>> I have a couple of questions:
>>
>> 1) Is this sort of fault to be expected if it is litterally one or
>> two pixels (as it is with TFTs)? Or is this an early sign that the
>> CCD is beginning to fail?
>
>
> It may be a new phenomenon, in which case it is some damage, which
> probably won't spread. Have you looked ta some pix from when the
> camera was new? You may have been not noticing.

When I first noticed the pixel I checked back and it was fine
litterally a few months eariler. However I have been very careful with
it and always carry it in its padded case. I think the worst that has
happened to it was it got dropped about 2 feet onto the floor when in
its case, that happened about 3 months before it started playing up so
is probably unrelated.

>
>> 2) Are CCDs difficult to replace? Where is a good place to find
>> replacements?
>
>
> Depends on how handy you are, and whether you are willing to risk
> wrecking the camera. And how you can get a replacement CCD. If the
> camera is a ocuple of years old, it probably isn't worth repairing.
> You could buy a used camera like it for less money.

Ok thanks.

>
>> 3) Is there any free software that can touch up these dropped pixels
>> without damaging the rest of the picture?
>
>
> In-camera software does this, ordinarily.

I didn't bother the camera photo editing software because I have got
PSP. But this may be the answer, I'll try it today.

Many thanks for all your help.

>
>>
>> Many thanks in advance,
>>
>> Tony.
>

 

[Guest]

Archived from groups: free.uk.photographic.equipment.digital,free.uk.photography,alt.comp.devices.digital-cameras,alt.comp.periphs.dcameras (More info?)

In article <4323ea2c$0$1309$ed2619ec@ptn-nntp-reader02.plus.net>, Tony
Cooper wrote:
> > It may be a new phenomenon, in which case it is some damage, which
> > probably won't spread. Have you looked ta some pix from when the
> > camera was new? You may have been not noticing.
>
> When I first noticed the pixel I checked back and it was fine
> litterally a few months eariler. However I have been very careful with
> it and always carry it in its padded case. I think the worst that has
> happened to it was it got dropped about 2 feet onto the floor when in
> its case, that happened about 3 months before it started playing up so
> is probably unrelated.

Almost certainly completely unrelated to physical abuse of the camera as
faulty pixels can occur without any handling at all. I have a Nikon 4500
which now has a faulty pixel it certainly didn't have when new, and it's
been lying unused in its case for the past six months or so since I
acquired a smaller camera that is more convenient to carry with me.

I know from experience that the cure is to return it to Nikon so they can
reprogram the look-up table that maps the faults and enables the camera's
firmware to conceal them by interpolation. However, I could probably buy
a new camera for what Nikon would charge for this.

Rod.

 

[Guest]

Archived from groups: free.uk.photographic.equipment.digital,free.uk.photography,alt.comp.devices.digital-cameras,alt.comp.periphs.dcameras (More info?)

Roderick Stewart wrote:

>In article <4323ea2c$0$1309$ed2619ec@ptn-nntp-reader02.plus.net>, Tony
>Cooper wrote:
>
>
>>>It may be a new phenomenon, in which case it is some damage, which
>>>probably won't spread. Have you looked ta some pix from when the
>>>camera was new? You may have been not noticing.
>>>
>>>
>>
>> When I first noticed the pixel I checked back and it was fine
>>litterally a few months eariler. However I have been very careful with
>>it and always carry it in its padded case. I think the worst that has
>>happened to it was it got dropped about 2 feet onto the floor when in
>>its case, that happened about 3 months before it started playing up so
>>is probably unrelated.
>>
>>
>
>Almost certainly completely unrelated to physical abuse of the camera as
>faulty pixels can occur without any handling at all. I have a Nikon 4500
>which now has a faulty pixel it certainly didn't have when new, and it's
>been lying unused in its case for the past six months or so since I
>acquired a smaller camera that is more convenient to carry with me.
>
>I know from experience that the cure is to return it to Nikon so they can
>reprogram the look-up table that maps the faults and enables the camera's
>firmware to conceal them by interpolation. However, I could probably buy
>a new camera for what Nikon would charge for this.
>
>Rod.
>
>
>
Very interesting I shall investigate the firmware thing. With any luck
it should be a DIY job as some cameras allow you to fiddle around with
the firmware at home or there may be a crack site etc.

Many thanks for all your help.

Cheers,

Tony.