Slow Sd Card for long exposure ???

Discussion in 'Accessories' started by PantelisMor, Mar 26, 2016.

  1. PantelisMor

    PantelisMor Mu-43 Veteran

    Jan 14, 2013
    Hello guys.

    I had a slow sd card. My EM1 took a long time to save the photo when i shoot long exposure photos. I decided to buy a new sd card. I bought a Sandisk class 10 95 MB/S.

    The problem is that i don't see big difference ? What is happening ? Had i taken another Sd card or is it normal ??

    Thx alot
  2. Petrochemist

    Petrochemist Mu-43 Top Veteran

    Mar 21, 2013
    N Essex, UK
    It's nothing to do with the card.
    With long exposures the camera takes a second shot (same time as the original) with the shutter closed to help remove noise (google 'Dark frame subtraction' for details). There's generally a option in the menu to turn off this behavior - something like 'long exposure NR'.
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  3. bmhome1

    bmhome1 Mu-43 Regular Subscribing Member

    Mar 4, 2015
    Rochester, NY
    There are staggering numbers of fake Sandisk SD being sold on eBay and even Amazon. Some have very exaggerated speed labels and even grossly lower capacities.

    I only ever buy sealed retail packaging.

    Also, 95MB/sec has been reserved for the Extreme Pro series up to now.

    The card pictured looks suspicious to me, with graphics unlike usual Sandisk high-end cards.

    You can check validity by running the tiny serial number engraved at SanDisk's website.
    Last edited: Mar 26, 2016
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  4. PantelisMor

    PantelisMor Mu-43 Veteran

    Jan 14, 2013
    I will search it when i have time. I believe it's Noise reduction..

    The truth is that i bought from ebay. I think it's fake !!!
  5. Wisertime

    Wisertime Mu-43 Hall of Famer

    Aug 6, 2013
    I think it's set up AUTO as default. Noise reduction (not noise filter). It kicks in on exposures over like 1-2 seconds. You will want it on. It's worth the extra wait..files come out nice and clean. Even w/fast card it's going to take double the amount of time of your exposure (30sec=1min total to take/write to card).
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  6. tkbslc

    tkbslc Mu-43 Legend

    As was said, it's doing noise reduction, not writing to the card during that extra time. The card being fake or not, is a different problem.