Dragging the Shutter / Rear Sync Flash techniques?

Discussion in 'Beyond the Basics' started by Illah, Oct 9, 2006.

  1. Illah

    Illah TPF Noob!

    Joined:
    Jun 29, 2006
    Messages:
    110
    Likes Received:
    0
    Location:
    San Francisco
    I shoot a lot of low light and have recently started learning these techniques. Does anyone know of any general tutorials on this, or just have any general advice?

    One thing that I come up against a lot is if I drop the flash down 1 1/2 to 3 stops under I get a much more balanced image, which is great for general ambiance. When I then take a picture of a person, the subject looks somewhat dark although well balanced against the background. If I bring the flash up to 0, or only 1/3 or 2/3 stop under, the subject pops out but the background is then really dark by comparison. Any ideas on how to balance it more while maintaining a poppy, well lit subject?

    So far I've managed to get good pics by bumping up the overall exposure in post via RAW processing but this introduces noise.

    --Illah
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,818
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    Every photo shot with flash is basically two exposures. One is exposed by ambient light and one is exposed by the flash...together they make up your image.

    If the background has very little light reflecting off of it...it will take a lot of exposure...that will probably mean a fairly long shutter speed. The flash can quickly illuminate a close subject...but the light falls off very quickly.

    Lets say you set your exposure for the background...and the shutter speed is very long....and you also fire the flash to illuminate your subject. This will work...but the problem is that you will also get an exposure of your subject from the ambient light...and because of the long shutter speed...any movement by the subject will cause blurring. The result will be that you have have a ghostly blur of your subject along with the sharp subject exposed by the flash.
     
  3. cumi

    cumi TPF Noob!

    Joined:
    Oct 12, 2005
    Messages:
    394
    Likes Received:
    0
    Location:
    Vienna, Austria
    Can others edit my Photos:
    Photos OK to edit
  4. Thanks Cumi, that's a pretty helpful site.
     
  5. Dylan

    Dylan TPF Noob!

    Joined:
    Aug 30, 2006
    Messages:
    226
    Likes Received:
    0
    Location:
    Delaware
    I agree. That guy obviously knows his stuff. it would be nice to aprentice with someone like that.
     
  6. Illah

    Illah TPF Noob!

    Joined:
    Jun 29, 2006
    Messages:
    110
    Likes Received:
    0
    Location:
    San Francisco
    I actually already came across that site - it's very good for more than just these techniques! I've been toying with what I learned there as well as other things, but I'm still not getting what I want... I think I need a faster lens to really capture the background without a super-long exposure.

    --Illah
     

Share This Page

Search tags for this page
drag the shutter flash
,

dragging the flash

,

dragging the shutter with flash

,
rear flash sync technic
,
rear flash technique
,
slow shutter flash iphone
,

slow sync flash iphone

,

slow sync flash technique

,
slow sync vs rear sync
,
slow synchro flash for iphone