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MMC vs SD - Photography

Hi, my camera (HP 735) accepts MMC/SD cards. My car stereo accepts MMC (it plays back audio off of CD/CDROM/MMC) but not SD cards. At present I don't have any of either of the above card types. I am still using the camera internal memory at the moment, and am content playing mp3s burnt to data CDR in my car. I intend to buy a memory card for the camera. What are the practical advantages of SD cards over MMC? The prices that I have seen are similar for both. Any speed difference? Max sizes of each format? Relative battery ...

  1. #1

    Default MMC vs SD

    Hi,
    my camera (HP 735) accepts MMC/SD cards. My car stereo accepts MMC (it plays
    back audio off of CD/CDROM/MMC) but not SD cards. At present I don't have
    any of either of the above card types. I am still using the camera internal
    memory at the moment, and am content playing mp3s burnt to data CDR in my
    car.

    I intend to buy a memory card for the camera. What are the practical
    advantages of SD cards over MMC? The prices that I have seen are similar for
    both. Any speed difference? Max sizes of each format? Relative battery
    drain?

    If SD is significantly better than MMC then I will buy SD, but if not I
    would be tempted to buy MMC so that I can put it to more than one use.

    Thanks for any advice.
    S.


    Roberts Guest

  2. #2

    Default Re: MMC vs SD

    >I intend to buy a memory card for the camera. What are the practical 

    SD cards can be used for copy-protected data (for example, you
    manufacture software for Palm handhelds, and want to distribute it on
    media cards instead of CD, but don't want people to be able to
    wontonly distribute the software once they have your card. SD could
    minimize the chances of that happening). If you don't need that
    capability, MMC cards are perfectly find for data that doesn't need to
    be secure. Photographs and MP3's, for example.
    Paul Guest

  3. #3

    Default Re: MMC vs SD


    "Paul Fedorenko" <look.ca> wrote in message
    news:com... [/ref]
    for 
    >
    > SD cards can be used for copy-protected data (for example, you
    > manufacture software for Palm handhelds, and want to distribute it on
    > media cards instead of CD, but don't want people to be able to
    > wontonly distribute the software once they have your card. SD could
    > minimize the chances of that happening). If you don't need that
    > capability, MMC cards are perfectly find for data that doesn't need to
    > be secure. Photographs and MP3's, for example.[/ref]

    I believe SD cards *can* be faster as they allow a 4-bit bus read/write,
    whereas MMC have only a 1-bit bus. Depends on the device though - the
    majority of cameras and pdas only use the 1-bit bus. Having said that, you'd
    only be likely to notice anyway if you were shooting video or fast sequences
    of shots saved as RAW (as opposed to JPEG). I tend to use MMC in my pda -
    more capacity (a bit less than an extra Mb per card) and I don't get the
    chance of accidentally write-protecting the card (SD cards have a small
    switch). If you get the chance, try them both - as they say, your mileage
    may vary....

    regards,
    DaveJ.


    DaveJ Guest

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