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Thread: What slows down a digital compact camera?

  1. #1 What slows down a digital compact camera? 
    Forum Ph.D. Leszek Luchowski's Avatar
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    I'm surprised that digital SLR cameras have a much faster reaction time than compacts. By "reaction time" I mean the time that elapses from the push of the button to the actual shot.

    I'd expect solid-state electronics to beat a mechanical shutter or mirror hands down. Why is it the other way round?

    TIA, L.


    Leszek. Pronounced [LEH-sheck]. The wondering Slav.
    History teaches us that we don't learn from history.
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  3. #2  
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    I think a lot of the time is wasted in attempting to focus. Most "real" SLRs are way better at it then the Point'n'Shoots, maybe because they look at the actual image and maximize the contrast.


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  4. #3  
    Forum Ph.D. Leszek Luchowski's Avatar
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    I don't think that's the only reason. My point-and-shooter focuses when I push the button half-way down, but then when I push it home the shot is still delayed.
    Leszek. Pronounced [LEH-sheck]. The wondering Slav.
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    my alternate explanation is that "they" make it that way just to frustrate me...I spent nearly a year ferreting out and shutting off all the automatic features on a nikon D200 (DSLR) and it still manages to come up with reasons to not do what I tell it to do...
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  6. #5  
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    Well, I had to get my digital camera out (Cannon G6 Power Shot) to see what you guys are talking about. I did not notice a delay. There was a delay for the half-way down focus, but not on the actual shot. However, there is a slight delay for the just taken shot to be processed, stored, and displayed on the LCD. Maybe that is what you are referring to?
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  7. #6  
    Forum Ph.D. Leszek Luchowski's Avatar
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    No I meant the delay of the shot. Whenever we try to take a photo of our 6-month-old Labrador retriever, we get a picture of his tail. People with SLRs (both digital and analog) insist their cameras are much faster.
    Leszek. Pronounced [LEH-sheck]. The wondering Slav.
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  8. #7  
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    My G6 is not an SLR. I tried taking some pictures of passing cars today but I did not notice the delay (considering the variance of my reflexes).
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  9. #8  
    Forum Freshman Sudhamsu's Avatar
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    SLRs have kind of electronic photographic plate called the CCD right? The point n shoots dont. The CCDs register the light falling on them in an instant, but the point n shoots work on some different principle. I think they scan the view almost pixel by pixel in an orderly manner, starting from top left, complete a row, then shift to second row, and so until it reaches the bottom right. (At least thats what happens inmobiles, i'm not sure though...) I think that explains the time lag... And also why straight object appear bent when moving...
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