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.)
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.
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.
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...
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.
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.
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.
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.
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.
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).
