A&P How can my flash actually slow down my shutter speed

Discussion in 'Lifestyle' started by Pineapple Devil, Jan 28, 2006.

  1. Pineapple Devil

    Pineapple Devil beat it!

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    I'm looking at the exif info for the last basketball game i shot and some of the pictures that I took using a flash actually have a dramatically slower shutter speed than the ones that I didnt use a flash on.

    flash = 1/60
    no flash = 1/160
     
  2. Specialist23

    Specialist23 OT Supporter

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    perhaps because with the flash you obviously don't need a faster shutter speed for people moving...:dunno:
     
  3. Crossett

    Crossett New Member

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  4. davequick

    davequick New Member

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    Each camera has a different flash sync speed - Some vameras as low as 1/60 sec - some as fast as 1/350 second. A flash sync speed is the fastest speed the camera can simultaneously trigger the shutter and the flash and then turn off the signal to the flash and close the shutter. That is what traditionally has been a selling point of pro slr camera - a quicker flash sync speed (sometimes called a "X" speed because on SLRs in the early days the spinning shutter speed selecter had a red X next to the speed that was the fastest possible to shoot with a flash)

    Then there are some that will trigger the flash then shoot somewhere in the middle of the flash shooting and be able to shoot with a shutter speed of up to 1/8000 of a secong (Nikon has this capability in their pro cameras when combined with their latest flash units (i.e. SB-600 or SB-800 combined with D2x or F6)).

    Your camera may simply have a slow flash sync speed.

    What camera do you shoot with? You can likely find the maximum shutter speed for your camera to operate with a flash inside of your user manual.

    p.s. I assume you had your camera in full manual mode shooting indoors and shooting sports - if you don't you're going to have a couple problems = 1) full auto mode on any modern camera typically takes longer between each depress of the shutter button because the camera's electronic brain analyzes the light in the image and the focus distance and some other factors (some use what colors are in the image, etc.) - this slows you down from shutter button depress to actual image being taken AND 2) the camera can get very confused based on the lights in a gym if they are in the frame and may try to use a much faster shutter speeed than appropriate - meaning you'll lose shadow detail on the players, etc.
     
  5. SpiderOnTheFloor

    SpiderOnTheFloor New Member

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    were you using p mode or green box mode?
     
  6. mojito

    mojito New Member

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    :bigthumb:
     
  7. Pineapple Devil

    Pineapple Devil beat it!

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    canon 350d is the camera
    sigma 500 dg super is the flash

    i believe i had it on p setting. can i use the av and it work properly? i need to have a variable shutter but a constant aperture at 2.8. yes its indoor basketball
     
  8. Pineapple Devil

    Pineapple Devil beat it!

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    aaaaaaaaaaand exit the thread :gtfo:
     
  9. ( * )( * )

    ( * )( * ) OT Supporter

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  10. Pineapple Devil

    Pineapple Devil beat it!

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    cool, thanks. i'm trying to get this figured out b/c i've got a game to shoot tonight and i'm going to try to use my flash
     
  11. BLKDVLGSX

    BLKDVLGSX OT Supporter

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    some can do 1/500 :o
     
  12. hash browns

    hash browns lolcathlon champion OT Supporter

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  13. Pineapple Devil

    Pineapple Devil beat it!

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    ok well now i'm confused. the link says it should work fine in P

    "Alternatively you can switch to full auto (green rectangle) or Program (P) mode, which automatically expose for the flash-illuminated subject and not the background. These modes try to ensure that the shutter speed is high enough to let you handhold the camera without a tripod. The drawback of P and basic modes is that photos taken in dimly lit areas usually end up with black or poorly lit backgrounds."

    eh screw it. i'll just play with it during the game in all manual settings
     
  14. SpiderOnTheFloor

    SpiderOnTheFloor New Member

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    manual mode, f.2.8 shutter of 1/200 should work out fine with that flash. the flash knows what your aperature and shutter speed and will adjust its power based on that.
     
  15. hash browns

    hash browns lolcathlon champion OT Supporter

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    make sure you hve permission to use an oncamera flash during a basketball game
     
  16. Pineapple Devil

    Pineapple Devil beat it!

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    i do


    i havent looked at the pictures on my screen yet, but they look really good on the camera lcd. i'll take a look at them tomorrow. i ended up having to turn down the flash to a -3 to keep from blacking out the background and casting shadows. i got a 1/200 shutter on f/2.8
     
  17. ( * )( * )

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    1d/D70 FTW
     
  18. mojito

    mojito New Member

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    it is working properly, just not what you expected. The flash itself is setting the exposure, throwing out whatever it needs to have a proper exposure at f/4 1/60

    use M if you're using flash, don't use anything else. AV will still read an ambient exposure and tell you that you need a long ass exposure in the gym, and will mix flash with it, so you'll have a 2 second exposure with flash.

    Just find a good exposure in M, and stick with it, you won't need to adjust it once you got it
     
  19. mojito

    mojito New Member

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    550ex high speed sync ftw

    nothing like fill flash at 1/2000
     
  20. hash browns

    hash browns lolcathlon champion OT Supporter

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