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Thread: Recommended Max Exposure Time

  1. #1

    Default Recommended Max Exposure Time

    Got a newbie question here.

    Read from book and website that it is recommended to set max exposure time to 1/X second where X is the focal length of the lens to minimize image blur due to handshake.

    But for a non-full frame camera like 450d where crop ratio is 1.6, len is at maybe 50mm and without IS. What should be the recommended max exposure? Is it 1/50 or is it 1/(50*1.6)?

    If it is 1/(50*1.6), need to be good at maths

  2. #2
    Senior Member zac08's Avatar
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    Default Re: Recommended Max Exposure Time

    Quote Originally Posted by slackerlism View Post
    Got a newbie question here.

    Read from book and website that it is recommended to set max exposure time to 1/X second where X is the focal length of the lens to minimize image blur due to handshake.

    But for a non-full frame camera like 450d where crop ratio is 1.6, len is at maybe 50mm and without IS. What should be the recommended max exposure? Is it 1/50 or is it 1/(50*1.6)?

    If it is 1/(50*1.6), need to be good at maths
    You mean MINIMUM shutter speed to avoid handshakes...

    just follow the focal length.. ignore the crop factor...
    Michael Lim
    My Flickr Site

  3. #3

    Default Re: Recommended Max Exposure Time

    Yes, I mean min shutter speed.

    There is no mention of crop factor in the book or website. Thanks for clarifying

  4. #4

    Default Re: Recommended Max Exposure Time

    yup, disregard the crop factor

    anything is in the lens, and not the camera. all the cropped camera does is records a smaller portion of the image as compared to a full frame

    that also explains why compacts dont have such a big problem with camera shake (focal lengths of only around 10mm)

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