Luminous Landscape Forum

Equipment & Techniques => Digital Cameras & Shooting Techniques => Topic started by: Edward on September 23, 2003, 10:49:14 pm

Title: Is this a dead/hot pixel?
Post by: Edward on September 23, 2003, 10:49:14 pm: It is turns out to be a cluster of 6 hot pixels. For those of you do not know about it, there is a great utility I just found for analyzing a file for hot and dead pixels:

http://www.starzen.com/imaging/deadpixeltest.htm (http://www.starzen.com/imaging/deadpixeltest.htm)

This is at 400 ASA, 1/20 sec. It is still visible at 100 with a fast shutter speed, but it is only a couple of pixels.

So, is this a warranty issue?
Title: Is this a dead/hot pixel?
Post by: Edward on October 09, 2003, 06:05:26 pm: Sent the camera to Canon. They got it on Monday, I had it back the following Tuesday. Said they cleaned the cmos and fixed the hot pixels. The pixels were fixed at the 400 speed range where I noticed them. You could still see some at longer exposures at 1600, but at 1600 you cannot expect perfection. Really great turnaround.
Title: Is this a dead/hot pixel?
Post by: Edward on September 23, 2003, 09:19:08 pm: Just found this spot on a bunch of my canon 10D images:

(http://biotech.law.lsu.edu/bad_spot.jpg)

This is a 32 pixel crop with what looks like a hot/dead pixel in the center. What does this look like to you? Is it a dust spot? I assumed that dust would be a black spot. It it is a bad pixel, is this a warranty replacement issue or does Canon just say tough luck?

Thanks for any help on this.
Title: Is this a dead/hot pixel?
Post by: Jeff Donald on September 23, 2003, 11:20:30 pm: None of us can say for certain, but it is certainly worth discussing with your dealer and Canon. I do know that with their video products (XL1, GL2) they have a formula that works out to be that around 15 to 20 pixels have to be dead for it to be a warranty issue that will be considered for warranty service. It's a gray area. Still photo products are a different division and different rules apply.