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card speeds

  • 08-04-2006 4:22pm
    #1
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭


    someone was saying they bought an 80 speed card, as they couldnt find any 133 speed...my question...

    I looked around a bit and on a 133 speed cards sustained minimum write speed is 20mb a sec...is this not overkill for a camera...when the buffer is taken into account? I'm possibly wrong and missing something, so if anyone can explain this to me or link me to an explaination, I'm all ears


Comments

  • #2
    Borderfox
    Registered Users, Registered Users 2 Posts: 10,263 ✭✭✭✭Borderfox


    Depends on what camera you have, if you have something with more than 10mp and shoot in RAW then it would be useful?


  • #3
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    but does the buffer not cover you for a fair few pics?


  • #4
    Borderfox
    Registered Users, Registered Users 2 Posts: 10,263 ✭✭✭✭Borderfox


    It does but if the raw pictures can be up to 7mb from an EOS 350d I think it can do 3fps then it builds up. I suppose if you are a pro then this could mean missing a critical moment say at a sporting event were fps is very important to getting the right shot. Personally I have never experienced the camera slowing down and I have a Kingston 50x cf card even going mad with the burst mode. I would say the market is fairly cut throat at the mo and manufacturers need every help selling their products.


  • #5
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    the buffer on a d200( a pro camera) is 19 raw+jpeg.

    I'm just seeing if anyone can properly justify the huge price difference in card speeds, as i'm purchasing a new one. I think this is all a big scam. fair enough the speed difference comes into play when its in your pc...but the illusion of a fast card allowing you to take more pictures in a short space of time...which it simple doesnt do is kinda takin the mickey.


  • #6
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    http://www.kenrockwell.com/nikon/d200/d200-high-speed.htm

    The D200 is never slowed by memory speed card. The D200, like other professional cameras, has a second independent set of processors which handle writing the contents of the fast buffer memory to the slower CF card. Because this writing is done with a second set of processors you never know it's working except for the green CF light on the back. The D200 can be busy for over a minute writing to the CF card and you still have the complete ability to shoot at 5 FPS and play back.


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  • #7
    Borderfox
    Registered Users, Registered Users 2 Posts: 10,263 ✭✭✭✭Borderfox


    You pays your money you make the choice :)


  • #8
    Cameraman
    Registered Users, Registered Users 2 Posts: 480 ✭✭Cameraman


    This site has a very comprehensive performance database for CF/SD cards in most digital cameras. Very useful.


  • #9
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    yeah i checked it out, it a great site, covers nearly every card


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