Blown out pixels on S5pro

[Viewpoint]

Hi, I recently found 3 or 4 blown-out or white pixels (out of 12 million) from my S5 (which is more than 6 months old). These are tiny specks visibly only at 100% view. They are always at the same position suggesting some hardware pixel problem... They don't trouble me much so I left them alone. They are also not visible in prints even up to 12x18.

Has anyone encountered the same problem? Is it normal and can it be easily corrected? It seems a minor problem to me (so long as more bad pixels do not emerge), and the Fuji service centre is not exactly conveniently located. But, as the camera is still under warranty, I am thinking of sending it back to Fuji...

Advice, anyone?

[grantyale]

Call them. Most likely they'll ask you to send it in and do a pixel-mapping for you. Alternatively you can use dcraw or similar tools to map out the dead pixels in RAW files, if you shoot RAW. Another way is to record an action/script to map out those pixels in Photoshop.

But dead pixel after 6 months is not a good thing...

[blazer_workz]

While its still on warranty..better to get it replace..

[cheersjy]

What was your exposure time like? Long exposure like 5-10 sec can trigger this, and Fuji does not use dark frame subtraction to get rid of hot pixels. My previous S5 body has this, and another set i tested out also showed the same. Somehow, my current set don't have.

http://forums.clubsnap.com/showthread.php?t=300951

[knpan]

hi can u share with us a 100percent crop of the area?

[Viewpoint]

Hi, thanks for the suggestions.

The hot pixels appear during fairly normal exposures (1/30s, 1/60, etc). I will try and post a 100% cropped sample later -- not much to see, just a white dot that becomes apparent against a dark, out of focus background. That's why for a long time I did not notice any of these hot pixels.

[photobum]

Yes, these are 'hot pixels'. Nothing wrong with your CCD, it just needs remapping. Send it in before the warranty is over.

Fuji Service Centre operates from 9am to 7pm, Monday to Friday. Closed on weekends and public holidays.

[knpan]

Anyway, can you share what really is remapping? Update the camera via usb?

[Viewpoint]

Originally Posted by photobum Yes, these are 'hot pixels'. Nothing wrong with your CCD, it just needs remapping. Send it in before the warranty is over. Fuji Service Centre operates from 9am to 7pm, Monday to Friday. Closed on weekends and public holidays.

OK, thanks v much.

On further testing, I notice that the hot pixels are definitely there at low shutter speeds, say, 1 sec (shot with lens cover on). At higher speeds of about 1/50, sometimes it's there, sometimes it's not.

Anyway, here's a sample of a single hot pixel at the upper part of the image.

Full image



100% crop



Thanks & Rgds.

[photobum]

Originally Posted by Viewpoint ;3689905Anyway, here's a sample of a single hot pixel at the upper part of the image.

Wah lau.... The hot pixels are so tiny that they literally unnoticeable if you don't tell me where they are. This is like looking for pinholes on negative films (for those of you who used to process your own film, remember what too much stop bath can do to your negatives?).

If I were you, I will just leave them alone. Sometimes remapping can backfire and make it worse than before.

[blazer_workz]

Originally Posted by photobum Wah lau.... The hot pixels are so tiny that they literally unnoticeable if you don't tell me where they are. This is like looking for pinholes on negative films (for those of you who used to process your own film, remember what too much stop bath can do to your negatives?). If I were you, I will just leave them alone.

true..although not noticeable..but since its still under warranty why not go for servicing? unless its too much hassle to make a trip down(u still got 6months)..by replacing wif a new sensor u not only feel better, u oso make ur camera more sellable when u decide to sell it later on..which most likely the warranty period will be over..

[photobum]

Originally Posted by blazer_workz true..although not noticeable..but since its still under warranty why not go for servicing? unless its too much hassle to make a trip down(u still got 6months)..by replacing wif a new sensor u not only feel better, u oso make ur camera more sellable when u decide to sell it later on..which most likely the warranty period will be over..

You have got a point there. It is for peace of the mind. Anyway, remapping can make it worse, better if Fuji can replace the CCD (which I doubt so).

[Viewpoint]

Yeah, i doubt Fuji will replace the entire CCD just becos of a few hot pixels. Anyway, from whatever info i can gather, it seems to be a common phenomenon, and if one looks hard enough or stress the camera far enough, they will be found!

I think I am inclined to leave it alone as there are only a few hot pixels and most of the time I don't see them. There are a lot more other bigger stuff that impacts IQ -- don't want to risk some technician messing up a delicate DSLR.

Finally, for those who have not read, some comments on this issue by KRW (which seems even wise).

"Don't worry about it. If you look hard enough you'll always find them."

http://www.kenrockwell.com/tech/hot-pixels/index.htm

Thanks all for your advice.

[sk318c]

Are you often printing the photo in 100% or more, or almost 100% size? If not, just live with it. You can actually always found these kinds of "defective" in digital cameras under conditions such as dark frame, slow speed etc.

Up to you to decide. Remapping, if can be done, may makes things worst. If you want a CCD replacement, the new CCD may have even more such pixels.

[knpan]

so that means your s5 is a bad prouction?

[photobum]

Originally Posted by knpan so that means your s5 is a bad prouction?

Nope.... ALL digital cameras face this problem. It is not a production fault.

[wind30]

well, when I bought my s3pro one year back, I think there was some dead pixels so I sent i back to fuji singapore thinking that they will do a simple remap. In the end, they replaced the whole CCD, reason was that they don't have the technology to do a pixel remap for the s3pro during that time.

I was quite surprised but I don't really care as the new CCD they replaced was perfect, although they installed back the viewfinder wrongly....

[Viewpoint]

Thanks, but i guess there is a difference between dead pixels and hot pixels? Depending on your view, hot pixels may be unavoidable when the shutter speed drops too low... so there is no guarantee that the remapping or replacement of CCD will solve the problem.

The other consideration is that i have no other problems with my S5 -- it focuses perfectly on all the lenses i have, Nikon and third party. I am really afraid of misalignment problems if i were to send it in...

Rgds.

[blazer_workz]

Originally Posted by Viewpoint Thanks, but i guess there is a difference between dead pixels and hot pixels? Depending on your view, hot pixels may be unavoidable when the shutter speed drops too low... so there is no guarantee that the remapping or replacement of CCD will solve the problem. The other consideration is that i have no other problems with my S5 -- it focuses perfectly on all the lenses i have, Nikon and third party. I am really afraid of misalignment problems if i were to send it in... Rgds.

Well! the decisions is still yours..