File Size Question . . . .Canon 300D

Discussion in 'Canon' started by Wayne Cattanach, Dec 18, 2004.

  1. I am new to the digital world having just got a Canon Rebel Digital (300D).
    Perhaps this is a simplistic question. . . But . . . I am not getting the
    file sizes that the owner's manual indicates. I have the camera set to L -
    smoothed and anticipated files in the 3.2 meg. However when "explored" using
    XP set up with a NTFS drive "Details" only show a file of 2.07 meg.
    Responses or insight are welcomed????

    Thanks
    Wayne
     
    Wayne Cattanach, Dec 18, 2004
    #1
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  2. Wayne Cattanach

    Steve Wolfe Guest

    I am new to the digital world having just got a Canon Rebel Digital
    (300D).
    Because the camera is performing JPEG compression on the image, the end
    file size can vary widely with the content of the photo. The camera will
    estimate larger file sizes than you'll see on average simply for the sake of
    safety ("Hey, you said I could get 12 more shots, and I only got 11!").

    I used a D300 for a day, and out of a hundred shots, the average file size
    was 2.4 megs - individual sizes were as low as 1.8 or 1.9 megs, with most
    being 2.1-2.5, and certain shots were as large as 4.3 megs.

    steve
     
    Steve Wolfe, Dec 18, 2004
    #2
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  3. Wayne Cattanach

    jfitz Guest

    JPG is a compressed format, so the file size will change significantly
    depending on the amount of detail in the image. An image with many unique,
    non-repetitive, colors and textures will be much larger than an image with
    large monotone areas.
     
    jfitz, Dec 20, 2004
    #3
  4. Wayne Cattanach

    jean Guest

    Also, there is a BIG change in image size when going up in ISO settings. I
    think the specs are for an average image at ISO 100.

    Jean
     
    jean, Dec 20, 2004
    #4
  5. Wayne Cattanach

    Ed Ruf Guest

    They will always be for the lowest ISO and will be quite conservative as
    well. Imagine the furor if there were times people couldn't fit the number
    of images per card as spec'd in the manuals.

    If you care to experiment make a new image in your photo editor and save at
    a given jpeg compression ratio. Then add noise and resave to another file
    and compare file sizes. The noiser photos will not compress nearly as much.
    ________________________________________________________
    Ed Ruf Lifetime AMA# 344007 ()
    http://EdwardGRuf.com
     
    Ed Ruf, Dec 20, 2004
    #5
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