Hot pixels fixed themselves ?

RaptorUK · Mar 7, 2004

I have had my S2 Pro since April last year. I noticed a hot blue pixel in a shot I took so I did some research here and on Google and did a test with the "Dead/Hot Pixel Test" software. I had 18 Hot pixels. Some red some blue. I did consider sending the S2 back but I wanted to use it and the hot pixels were not very noticable.

I have been thinking about sending the camera in to Fuji UK to get the hot pixels mapped out before my year warranty expires . . so today I repeated the test I did last year in April . . . I now have only 3 white hot pixels . . . I checked the EXIF info on the original test picture and I have repeated with the same ISO, aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be dirt on the CCD, I have a splodge on my pics that has been there since april.

--
Take a look at my album . . . http://www.F1Album.com

Masterdeath · Mar 7, 2004

Was the camera the same tempature?

If they camera is hotter or colder it will affect the number of bad pixel showing up sometimes. They were HOT pixels not DEAD pixel right? Dead pixel I dont think every change.. But i noticed the same thing with the hot pixels. When I used the camera during the summer they showed up a little more, and I had more of them. When I took some long exposures of an moon eclipse it was 40 degrees outside and I shot at a high iso on some to check the shot and those has less pixel then useally..

RaptorUK said:
I have had my S2 Pro since April last year. I noticed a hot blue
pixel in a shot I took so I did some research here and on Google
and did a test with the "Dead/Hot Pixel Test" software. I had 18
Hot pixels. Some red some blue. I did consider sending the S2
back but I wanted to use it and the hot pixels were not very
noticable.

I have been thinking about sending the camera in to Fuji UK to get
the hot pixels mapped out before my year warranty expires . . so
today I repeated the test I did last year in April . . . I now
have only 3 white hot pixels . . . I checked the EXIF info on the
original test picture and I have repeated with the same ISO,
aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be
dirt on the CCD, I have a splodge on my pics that has been there
since april.

--
Take a look at my album . . . http://www.F1Album.com

RaptorUK · Mar 7, 2004

The temerature in April would have been a little warmer, but not by much, I may try the same test after the S2 has been in my warm living room for an hour. Yes the pixels are HOT not DEAD . .

regards,

Masterdeath said:
RaptorUK said:

I have had my S2 Pro since April last year. I noticed a hot blue
pixel in a shot I took so I did some research here and on Google
and did a test with the "Dead/Hot Pixel Test" software. I had 18
Hot pixels. Some red some blue. I did consider sending the S2
back but I wanted to use it and the hot pixels were not very
noticable.

I have been thinking about sending the camera in to Fuji UK to get
the hot pixels mapped out before my year warranty expires . . so
today I repeated the test I did last year in April . . . I now
have only 3 white hot pixels . . . I checked the EXIF info on the
original test picture and I have repeated with the same ISO,
aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be
dirt on the CCD, I have a splodge on my pics that has been there
since april.

--
Take a look at my album . . . http://www.F1Album.com

Click to expand...

--
Take a look at my album . . . http://www.F1Album.com

Paulo Abreu · Mar 7, 2004

Hi, other than temperature, there´s another possibility - check this thread a while ago:
http://forums.dpreview.com/forums/read.asp?forum=1020&message=7713626

Regards,

RaptorUK said:
I have had my S2 Pro since April last year. I noticed a hot blue
pixel in a shot I took so I did some research here and on Google
and did a test with the "Dead/Hot Pixel Test" software. I had 18
Hot pixels. Some red some blue. I did consider sending the S2
back but I wanted to use it and the hot pixels were not very
noticable.

I have been thinking about sending the camera in to Fuji UK to get
the hot pixels mapped out before my year warranty expires . . so
today I repeated the test I did last year in April . . . I now
have only 3 white hot pixels . . . I checked the EXIF info on the
original test picture and I have repeated with the same ISO,
aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be
dirt on the CCD, I have a splodge on my pics that has been there
since april.

--
Take a look at my album . . . http://www.F1Album.com

--
Paulo Abreu,

'Buy a FujiFilm S2 Pro TODAY because ONE DAY you will be dead !'
http://www.mcscenter.net/~psergio/index.php

RaptorUK · Mar 7, 2004

I have read that thread before and considered doing it . . . but never did.

Paulo Abreu said:
Regards,

RaptorUK said:

I have had my S2 Pro since April last year. I noticed a hot blue
pixel in a shot I took so I did some research here and on Google
and did a test with the "Dead/Hot Pixel Test" software. I had 18
Hot pixels. Some red some blue. I did consider sending the S2
back but I wanted to use it and the hot pixels were not very
noticable.

I have been thinking about sending the camera in to Fuji UK to get
the hot pixels mapped out before my year warranty expires . . so
today I repeated the test I did last year in April . . . I now
have only 3 white hot pixels . . . I checked the EXIF info on the
original test picture and I have repeated with the same ISO,
aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be
dirt on the CCD, I have a splodge on my pics that has been there
since april.

--
Take a look at my album . . . http://www.F1Album.com

Click to expand...

--
Paulo Abreu,

'Buy a FujiFilm S2 Pro TODAY because ONE DAY you will be dead !'
http://www.mcscenter.net/~psergio/index.php

--
Take a look at my album . . . http://www.F1Album.com

Paulo Abreu · Mar 7, 2004

Hi,

RaptorUK said:
I have read that thread before and considered doing it . . . but
never did.

Yes but meanwhile maybe you have made one or two overexposures and the effect may be the same ...? I don´t know, this is only a guess for a reason why you lost the hot pixels ...

S2 is like red wine ... improves with age

Regards,

RaptorUK said:
Paulo Abreu said:

Regards,

RaptorUK said:

I have had my S2 Pro since April last year. I noticed a hot blue
pixel in a shot I took so I did some research here and on Google
and did a test with the "Dead/Hot Pixel Test" software. I had 18
Hot pixels. Some red some blue. I did consider sending the S2
back but I wanted to use it and the hot pixels were not very
noticable.

I have been thinking about sending the camera in to Fuji UK to get
the hot pixels mapped out before my year warranty expires . . so
today I repeated the test I did last year in April . . . I now
have only 3 white hot pixels . . . I checked the EXIF info on the
original test picture and I have repeated with the same ISO,
aperature, shutter speed and focal length.

Weird eh ?

I still plan to send the camera to Fuji, there is appears to be
dirt on the CCD, I have a splodge on my pics that has been there
since april.

--
Take a look at my album . . . http://www.F1Album.com

Click to expand...

--
Paulo Abreu,

'Buy a FujiFilm S2 Pro TODAY because ONE DAY you will be dead !'
http://www.mcscenter.net/~psergio/index.php

Click to expand...

--
Take a look at my album . . . http://www.F1Album.com

--
Paulo Abreu,

'Buy a FujiFilm S2 Pro TODAY because ONE DAY you will be dead !'
http://www.mcscenter.net/~psergio/index.php

SeanDoherty · Mar 7, 2004

Paulo Abreu said:
Yes but meanwhile maybe you have made one or two overexposures and
the effect may be the same ...? I don´t know, this is only a guess
for a reason why you lost the hot pixels ...

I can confirm that is exactly the experience I have had. I have one particular pixel that has been hot and normal a couple of times now. If I look back through my captures is goes after a number of shots where the area of the sensor that it is in was not exactly over exposed but certainly within a highlight/well lit chromakey background area.

Also similar to others experiences I have seen hot pixels appear after cleaning and I have also seen them go. This has always intrigued me and I must admit worried me. Is it caused by excess pressure, or even more worryingly is the glass front of the sensor actually slightly permeable?

Sean

Masterdeath · Mar 7, 2004

I cant figuar out what out DSLR dont have black balance like high end video camera do.. You have white and black balance.. The video cameras have have a switch, up is WB and down is BB. It closes the iris down and when it sees hot/dead pixels it remappes them automatically!

hmm

SeanDoherty said:
Paulo Abreu said:

Yes but meanwhile maybe you have made one or two overexposures and
the effect may be the same ...? I don´t know, this is only a guess
for a reason why you lost the hot pixels ...

Click to expand...

I can confirm that is exactly the experience I have had. I have
one particular pixel that has been hot and normal a couple of times
now. If I look back through my captures is goes after a number of
shots where the area of the sensor that it is in was not exactly
over exposed but certainly within a highlight/well lit chromakey
background area.

Also similar to others experiences I have seen hot pixels appear
after cleaning and I have also seen them go. This has always
intrigued me and I must admit worried me. Is it caused by excess
pressure, or even more worryingly is the glass front of the sensor
actually slightly permeable?

Sean

Jusko · Mar 7, 2004

Masterdeath said:
I cant figuar out what out DSLR dont have black balance like high
end video camera do.. You have white and black balance.. The video
cameras have have a switch, up is WB and down is BB. It closes the
iris down and when it sees hot/dead pixels it remappes them
automatically!

The Olympus E1 (DSLR) has hot/dead pixels mapping function.

I suggest other camera manufacturers should follow suit Olympus to have this function built into their DSLR.

RaptorUK · Mar 8, 2004

Jusko said:
The Olympus E1 (DSLR) has hot/dead pixels mapping function.

I suggest other camera manufacturers should follow suit Olympus to
have this function built into their DSLR.

From what has happened to my S2 it looks like it doesn't need it . . the 3 hot pixel I have now are not a problem.

--
Take a look at my album . . . http://www.F1Album.com

RaptorUK · Mar 9, 2004

So when I send my S2 in for the CCD cleaning what else should I ask them to look at ?? Suggestions please . . . .

--
Take a look at my album . . . http://www.F1Album.com

Pete Moss · Mar 9, 2004

RaptorUK;

I mailed mine back yesterday, my warranty is up in 3 days. I told them that I had hot pixels i wanted fixed, then asked if they could check to see if everthing else is within spec. , things such as AF accuracy, metering accuracy, flash exposure. I'll see soon what they say.

Good luck.

Pete

greatweb · Mar 12, 2004

This is not actually the purpose of white and black balance though. I won't dispute that some of the high end cameras like the Panasonic DVCPRO50 cameras do do this but most do not.

When you do a white balance you are telling the camera the colour temperature of the light, not mapping dead pixels.

Black balance is a little more complicated and has to do with the specific voltages produced and black detail. It is not mapping hot pixels.
For a quick reference on these two look at:
http://www.mediacollege.com/video/camera/howto/white-balance.html

In general white balance is something every digital photographer needs to understand. So anyone out there who doesn't know, go out and find out about it!

Chris

Masterdeath said:
I cant figuar out what out DSLR dont have black balance like high
end video camera do.. You have white and black balance.. The video
cameras have have a switch, up is WB and down is BB. It closes the
iris down and when it sees hot/dead pixels it remappes them
automatically!

hmm

Eddy Smit · Mar 12, 2004

TTL flash?? Finally works with my S2.

RaptorUK said:
So when I send my S2 in for the CCD cleaning what else should I ask
them to look at ?? Suggestions please . . . .

--
Take a look at my album . . . http://www.F1Album.com

RaptorUK · Mar 27, 2004

Sent the S2 in to Fuji in Bedford (UK) on Wednesday with sample prints and images on CD for them to look at . . . I have dirt on the CCD from day one and have had some focus problems . . . anyone here have any idea how long this type of warranty work takes in the UK ?? I am off to Thruxton on the 11th April for a BTCC event (motorsport) . . I have a D1X on hand if the S2 doesn't get back in time . . .

kind regards . . . .

Eddy Smit said:
RaptorUK said:

So when I send my S2 in for the CCD cleaning what else should I ask
them to look at ?? Suggestions please . . . .

Click to expand...

--
Take a look at my album . . . http://www.F1Album.com

RaptorUK · Apr 3, 2004

RaptorUK said:
Sent the S2 in to Fuji in Bedford (UK) on Wednesday with sample
prints and images on CD for them to look at . . . I have dirt on
the CCD from day one and have had some focus problems . . . anyone
here have any idea how long this type of warranty work takes in the
UK ?? I am off to Thruxton on the 11th April for a BTCC event
(motorsport) . . I have a D1X on hand if the S2 doesn't get back in
time . . .

I got my S2 back from Fuji today after having to pay to have dirt cleaned from the CCD, it cost me £94 . . . dispite my insistance that the dirt had been there since day 1 they said I should have sent the camera back within 28 of purchase. My S2 is still in warranty. My argument was that I couldn't identify the problem as dirt that soon after getting my first digital camera . . . never mind. The cost also includes a full clean of the mirror box as well so I am not really unhappy . . . and trunaround time was excellent. I have done a test image of the blue sky at f22 . . I have one spot of dirt off to the far right of the frame . . I can live with that.
--
Take a look at my album . . . http://www.F1Album.com

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Hot pixels fixed themselves ?

RaptorUK

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Masterdeath

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RaptorUK

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Paulo Abreu

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