本帖最後由 maanmo 於 2009-5-31 15:54 編輯
if you are interested in fixing the canon
you might try talking to the salesperson who sold you the camera
you might get some helpful suggestions
here is a discussion i found by googling " canon s5 is, sensor , defect "
http://www.howtofixcomputers.com ... -how-fix-38643.html
> Yesterday my Canon Powershot A85 started malfuncitoning and I can't
> get rid of the effect so far... I started seeing a stack
> of stripes at the bottom and top borders...
A similar thing happemed to my A70. There's a Service Notice on the Canon
Web site describing a known problem with the CCD wiring:-
http://www.usa.canon.com/consumer/co...1&modelid=8776
It states that "regardless of warranty status, Canon will repair, free of
charge, the products listed above exhibiting the above-mentioned malfunction
if Canon determines that the malfunction is caused by the CCD image sensor".
I got in touch with Canon, they put me in touch with a local repair centre,
and the camera got fixed FOC.
++++++++++++
maanmo says , unfortunately the canon link above about " repair, free of charge "
is not available
the link below has some interesting discussion on hot canon pixels....
http://www.digitalcamera-hq.com/digital-cameras/canon-powershot-s5is_question.html?qid=13081
I tested two canon S5 IS cameras within this last week. Both had sensor defects, the first one had 2 hot pixels, the second one had a vertical line on the right side of the image. Returned the last camera, and decided to wait for a better batch. In terms of picture quality - excellent exposure and colours, cannot complain about softness as images were actually quite sharp, better than on other powershots. The CCD sensor is very noisy, to the point that even at ISO 80 the grain was somewhat noticable when viewed at its full resolution. Images are not usable beyond ISO 400. Also, I was not very impressed with the noise reduction and processing as it left a lot of processing artifacts - overagressive, but I guess it was necessary to employ such processing to eliminate some of that terrible noise. Of course you'd have to view the image at full resolution and possibly even zoomed in to see all that, as most of my 8" by 10" came out great. The movie mode is excellent, as is the image stabilization. Very sensitive stereo microphones. My advice when you get one: test it very well, to make sure you didn't end up with a defective CCD.
To assess hot pixels you have to take some shots of a uniform background (ie: white or gray wall) in a uniform lighting condition, under various settings of the camera, usually varying the ISO settings. View the pictures on your computer monitor, in full resolution, and zooming in also helps....... |