Used 50D has stuck pixel

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Archive 2009 · Used 50D has stuck pixel

Gilligan8
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p.1 #1 · Used 50D has stuck pixel

I picked up a 50D and found that it has a stuck pixel. I am not sure if I should be upset about this. The PO didn't mention it and I'm not sure if he knew but at the same time I have a hard time thinking he didn't know in a sense.

Here is some pics.

From the first pic you can't see it too bad... this is a crop of a shot of a flower in full daylight ISO 100. The second pic is much more obvious, it is also cropped piece of the full res pic and is at an ISO of 400 (it is inside with super slow shutter to compensate.)

First image

Second Image

Or am I making way to big a deal of this and it's normal?

Jul 17, 2009 at 07:22 PM

jerrykur
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p.1 #2 · Used 50D has stuck pixel

You can try the stuck pixel mapping trick (remove lense, put cap on, put camera in manual clean, wait a minute, turn power off). If that does not work consider using shooting raw and using an Abobe product. ACR maps out stuck pixels.

Jul 17, 2009 at 07:25 PM

victorXT
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p.1 #3 · Used 50D has stuck pixel

Every digital SLR I owned (350D, 40D and 5D) have dead or stuck pixels. The higher the ISO and the longer the exposured, the more they show up. And like Jerry said, trying a sensor clean cycle and using a good raw convertor will get rid of most of them.

Jul 17, 2009 at 07:42 PM

Gilligan8
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p.1 #4 · Used 50D has stuck pixel

So this is pretty normal and I shouldn't feel upset with the guy that sold it to me?

Jul 17, 2009 at 07:44 PM

Gochugogi
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p.1 #5 · Used 50D has stuck pixel

All the EOS bodies I've owned--10D, 20D, 40D, 50D, 5D--shipped with stuck pixels. It's normal unless excessive. No biggie you can map them out in your processing software if they bother you. It's nothing compared to the scratches labs used to put on my negs and chromes...

Has nothing to do with the guy whom sold it to you. That's a factory installed feature! I guess it's sorta like a hot woman with a hidden zit. Not too many guys would reject her because of a tiny blem...

Jul 17, 2009 at 07:46 PM

Gilligan8
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p.1 #6 · Used 50D has stuck pixel

I didn't mean he did it... I meant "should he have disclosed it" or is it possible that he didn't know about it some how?

Jul 17, 2009 at 08:05 PM

Pavel
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p.1 #7 · Used 50D has stuck pixel

One out of 12 million? Some people don't pixel peep.

Jul 17, 2009 at 08:07 PM

Gilligan8
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p.1 #8 · Used 50D has stuck pixel

Well, at 3200 ISO it was kind of obvious... it gets blown into about a 3x3 pixel section.

It happened to be right where I was looking at for sharpening on my daughter's hair.

Jul 17, 2009 at 08:09 PM

Pavel
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p.1 #9 · Used 50D has stuck pixel

Is it still there at iso 200?

I know for example that canon will not consider a stuck pixel something as warrantied. In the middle of the frame it is a bit of a bummer, but can be easily mapped out in post.

Jul 17, 2009 at 08:14 PM

JL77
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p.1 #10 · Used 50D has stuck pixel

It is normal, my 20D, 5D, and 1Ds MK II all had some hot pixels.

Jul 17, 2009 at 08:15 PM

Gilligan8
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p.1 #11 · Used 50D has stuck pixel

Pavel wrote:
Is it still there at iso 200?

I know for example that canon will not consider a stuck pixel something as warrantied. In the middle of the frame it is a bit of a bummer, but can be easily mapped out in post.

It is visible in ISO 100 and is located at 3269x2055 in DPP looking at the RAW image.

Jul 17, 2009 at 08:26 PM

Gochugogi
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p.1 #12 · Used 50D has stuck pixel

Gilligan8 wrote:
Well, at 3200 ISO it was kind of obvious... it gets blown into about a 3x3 pixel section.

It happened to be right where I was looking at for sharpening on my daughter's hair.

I've never used ISO 3200 on my 50D (knew better not to!). I've found ISO 1600 is too gritty for normal use on a 50D or 40D. Would only use it in an emergency. For my taste, ISO 800 is the limit for the 50D. What I'm saying is not everyone pixel peeps or shoots at those terrible high ISO settings. But, yeah, the higher the ISO, the more apparent artifacts and blems become.

Jul 17, 2009 at 09:05 PM

RobertLynn
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p.1 #13 · Used 50D has stuck pixel

If you're pissed about it, tell him and send it back.

It happens. My brand new 40D had a few. Out of the millions on the sensor, there's bound to be some.

Jul 17, 2009 at 09:24 PM

RobertLynn
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p.1 #14 · Used 50D has stuck pixel

What I mean though is, no I don't think that 1 stuck pixel is even worth mentioning in the sale thing, and a lot of converters will automatically map it out for you.

Jul 17, 2009 at 09:25 PM

hardlyboring
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p.1 #15 · Used 50D has stuck pixel

I would be thrilled if my camera only had 1 stuck pixel.
doug

Jul 17, 2009 at 09:42 PM

Gilligan8
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p.1 #16 · Used 50D has stuck pixel

Yeah, I'm not really pissed per se... it did make me a little sick to my stomache when I noticed it. I was just looking to hear if it was a big deal. It is apparently not so I guess that is life.

If I really was pissed I would have already have contacted the seller. I have not done so and I don't plan on it at this point.

Jul 17, 2009 at 09:43 PM

philbinley
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p.1 #17 · Used 50D has stuck pixel

Photoshop it and move on

Bill

Jul 17, 2009 at 09:45 PM

RobertLynn
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p.1 #18 · Used 50D has stuck pixel

Yeah, stuck pixels come with the territory. I've got some on my 5D, 40D and had them on the 30D.

Such is life in the digital realm.

Jul 17, 2009 at 09:47 PM

Gilligan8
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p.1 #19 · Used 50D has stuck pixel

Gochugogi wrote:

I've never used ISO 3200 on my 50D (knew better not to!). I've found ISO 1600 is too gritty for normal use on a 50D or 40D. Would only use it in an emergency. For my taste, ISO 800 is the limit for the 50D. What I'm saying is not everyone pixel peeps or shoots at those terrible high ISO settings. But, yeah, the higher the ISO, the more apparent artifacts and blems become.

Yeah, I am just getting familiar with the camera and DSLR's in general so without breaking out my complete Arri light kit (which is actually out of state with my partner) I just wanted to play around with composition and DOF stuff. Doesn't help that I'm rather noctornal and it's rediculously hot so going outside just seems obsurd right now.

I had actually started another topic about what ISO relates to in gain (db) because I am one that rather not add any gain to any shot if I don't have to and wanted to know where 0 was and what ISO 3200 was. I rarely push my video cameras to 12db unless I absolutely have to (wedding receptions).

Jul 17, 2009 at 10:02 PM

keithreeder
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p.1 #20 · Used 50D has stuck pixel

Gilligan8 wrote:
I was just looking to hear if it was a big deal.

So I don't suppose you did a search and read the hundreds of previous posts on stuck/dead pixels, then...

That might have given you a clue.

Jul 17, 2009 at 10:09 PM

Gilligan8
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p.1 #21 · Used 50D has stuck pixel

Actually I did... some said it was common. But I also found it to be present at ISO 100 which brought up my curiosity. I also bought this used and wasn't sure if that was something that is commonly divulged and should I be upset about it.

Most threads were about people that had the issue... not bought the camera 2nd hand blah blah blah.

Jul 17, 2009 at 10:15 PM

Gochugogi
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p.1 #22 · Used 50D has stuck pixel

You could have Canon map them out. I sent my 5D in for "the mirror fix" last month and it came back with most of the hot pixels mapped out. I didn't ask for it, they just did it and also cleaned the CMOS and focusing screen (actually made it dirtier!). The pixels didn't bother me these past 3 years but I'll be selling soon and now the buyer won't be able to complain about any stuck pixels!

Jul 17, 2009 at 10:22 PM

Nieuport N28
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p.1 #23 · Used 50D has stuck pixel

so the question remains.......have you tried the sensor cleaning mode yet to see if it goes away

.

if that's the only one you see at ISO 3200, then you have nothing to comlain about.........and i'll bet it won't show in a print.

Jul 17, 2009 at 11:15 PM

ward1066
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p.1 #24 · Used 50D has stuck pixel

sensor clean mode doesnt work, once you process it in DPP or PS it will be gone. I have one on my ds3 that I just ignore.

Jul 17, 2009 at 11:46 PM

EB-1
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p.1 #25 · Used 50D has stuck pixel

DPP does not remove hot pixels.

EBH

Jul 17, 2009 at 11:51 PM


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