filmy a zużycie matrycy

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Pytanie do forumowych mądrali: jaki wpływ na stan matrycy aparatu ma kęcenie fimów? O ile podczas zdjęć matryca "włacza się" tylko na chwilę, to w czasie filmowania "pracuje" przez cały czas (i grzeje się?). Czy wpływa to na jej żywotność?

I use my EOS digital cameras for unusual photography (flying bats, star trails, etc.) and am wondering if long exposures or keeping the camera running for long periods (three hours) can damage the CMOS sensor or other parts of the camera. I used three of my cameras the other night and after several hours of use in the hot Arizona desert they failed to take some images. Could I have done some long-term damage????

Long exposures pose no threat to the longevity of Canon's CMOS sensors in EOS Digital SLRs, but they will run the camera's battery down. If the battery voltage falls below a prescribed limit, the camera will shut off and any image data in the buffer memory will be lost. I've commented on this topic several times in previous editions of Tech Tips, most recently in November 2008. Here is a relevant excerpt:

"Realistically, maximum bulb exposure time for an EOS Digital SLR is going to depend on the type of power supply and to some extent the ambient temperature conditions. By far the longest exposures are enabled when using the optional DC Couplers and AC Adapter Kits, since these accessories eliminate concerns about battery life. If you're doing astrophotography from your backyard or any other location where AC power is accessible, this is probably the most feasible solution. When AC power is not accessible, the next best solution is to use an optional battery grip and load it with two lithium-ion rechargeable battery packs. The battery grips and battery packs will vary according to the camera model involved, but in moderate temperatures it would be reasonable to expect no more than approximately 4 to 6 hours of battery life for time exposures with a two-battery power supply. In situations where only one battery pack is available, the total bulb exposure time in moderate temperatures will be somewhere in the range of 2 to 3 hours. Cooler temperatures down to the cameras' minimum rated operational range of 32 degrees Fahrenheit will reduce battery life somewhat. In answer to your second question, any image data in the camera's buffer memory will be lost if the camera loses power before the file is written to the memory card. Since long exposure noise reduction in the camera can last as long as the actual exposure, you'll need to factor that into your decision on setting the length of time exposures."

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