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View Full Version : CCD's and Bad Pixels....Can anybody make that clear?


Downhill
13th of September 2004 (Mon), 01:49
I' ve read that CCD sensors have a limited lifespan of aproximately 10000 photos. Near that point "bad Pixels" beggin to appear. Is that true? And if so, does the "video" feature deteriorates the CCD's performance quicker?
I have a Canon powershot A60 for about a year and i've already shot >3000 pics and videos. I consider to upgrade to powershot G6 but if the above are true, i wouldn't be intrested to put that much money to something that has an expire date.
:?:

Belmondo
13th of September 2004 (Mon), 02:51
I've never heard that.

BOBinsane
13th of September 2004 (Mon), 04:34
I've taken 30,000 images with my powershot S30. When I first bought it it only had 1 dead acceptable pixel. And when it finally met it's demise 2 weeks ago, it had 5 dead pixels. I suppose cameras will lose pixels eventually. I don't think doing video mode should affect it. I think what might increase the likelyhood of dead pixels are things like, shooting a lot of images with extended shutters speeds (4 seconds or more) since the CCD will heat up a little and create some noise, or the other ways of this happening are either enviromental issues or the way you take care of your camera (dropping it, etc).

But in my opinion I seriously doubt that you should be concerned with how much you use your camera. Go ahead take as many pictures as you want, the buttons on the camera itself will probably die before the image quality of your CCD truly deterioates. :0)

Andy_T
13th of September 2004 (Mon), 10:10
The sensor of the P&S camera is on when it is not turned off or hibernating, otherwise you could not see a live preview in the lcd viewfinder.

So I think that it won't matter if you shoot videos or extended aperture shots.

'Dead' or 'hot' pixels turn up, but they are not always a problem. They are prone to be more visible during long term exposures.

My G2 has about 5 hot/dead pixels now after about 2 years of use and 15,000 photos. Hot pixels can be quite visible during night shots, but with the 'heal' tool in PS, it's really not a great problem (at least not for me).

Best regards,
Andy