Page 1 of 2 12 LastLast
Results 1 to 20 of 27

Thread: What is slow-sync?

  1. #1

    Default What is slow-sync?

    Hi!
    What is slow-sync?
    Anyone care to explain?

  2. #2
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Refer to this site...

    http://www.photo.net/concerts/mirarchi/concer_4.htm

    Hope it helps...

  3. #3

    Default

    slow sync = flash + original speed (exposure setting) as if without flash.
    DR KOH KHO KING

  4. #4
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    Quote Originally Posted by Kho King
    slow sync = flash + original speed (exposure setting) as if without flash.
    need it be original speed?
    a shutter speed that is faster than the original metered shutter speed will still be considered slow sync if it this shutter speed is less than flash sync speed.

    correct me if im wrong.

    for example.
    ambient light gives f2.8 1 second.
    shooting at f2.8 1/15 (not the actual shutter speed) is considered slow sync.
    assuming you are shooting with a F100 which has a flash sync speed of 1/250

    this concept is well described in the article that kira posted
    Last edited by showtime; 17th September 2003 at 05:26 PM.

  5. #5
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by showtime
    need it be original speed?
    a shutter speed that is faster than the original metered shutter speed will still be considered slow sync if it this shutter speed is less than flash sync speed.

    correct me if im wrong.

    for example.
    ambient light gives f2.8 1 second.
    shooting at f2.8 1/15 (not the actual shutter speed) is considered slow sync.
    assuming you are shooting with a F100 which has a flash sync speed of 1/250

    this concept is well described in the article that kira posted
    Yes that is slow sync....

    Slow sync is when your shuttle speed is slower then the camera's flash sync speed, It doensn't matters what speed you're shooting at... Most SLR camera nowadays have a flash sync speed of between 1/60s to 1/125s so shooting at a speed slower then this range is consider slow sync for that camera....

    For your camera's flash sync speed, please refer to your camera's manual....

    Hope this helps.

  6. #6
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    thanks for replying so fast...
    yep... my F80 has sync of 1/60 to 1/125...
    wish i had something better though... fill flash in day time is a pain for me...

  7. #7
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Fill flash in the day with your built in flash? I'll suggest get a better flash unit... The built in flash is good only if you're close to your subjects.. I'm using the F80 with a SB80Dx, don't have any problems with fill flash during the day leh....

    If I'm not wrong, the manual for the F80 have the specification of the built in flash... When you compare those the the spec of the SB80DX, you'll realise where your problem is... IMO, the built in flash is only good when you'll either too lazy to bring out your flash unit or for those close up fill flash....

  8. #8
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by showtime
    thanks for replying so fast...
    yep... my F80 has sync of 1/60 to 1/125...
    wish i had something better though... fill flash in day time is a pain for me...
    I don't see how by having a flash sync of 1/250 will help in your fill flash during the day leh.....

    Anyway, when it comes to flash, you'll seldom use a shuttle speed that's slower then 1/125 unless you've one of those studio flashes....


  9. #9
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    i think i have got you confused....
    i have a sb80... but the problem is that with the 1/125 sync speed, my apperture has to quite small to aviod overexposure... so i cannot get the nice blurry background with the portraits i shoot.

    with a sync speed of 1/500, i have 2 stops more on apperture... tada!!! more blur backgrounds!!!!!

  10. #10
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    i guess this is a very specific need of mine... so not many people will identify with my problem...

  11. #11
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by showtime
    i think i have got you confused....
    i have a sb80... but the problem is that with the 1/125 sync speed, my apperture has to quite small to aviod overexposure... so i cannot get the nice blurry background with the portraits i shoot.

    with a sync speed of 1/500, i have 2 stops more on apperture... tada!!! more blur backgrounds!!!!!
    Hmmmm... You try shooting with Aperature piorty and spot metering and TTL flash?

  12. #12
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    yep i shoot in A mode...as well as ttl flash... but matric metering...
    but i think no diff as the face is very bright too
    i try to keep the appertures as wide as i can but the F80 will give a high notification... so i have to stop down...thus no blur effect...

    my fill flash is used not so much to light up a dark face, but rather to soften the shadows that have been cast by natural lighting...

  13. #13
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by showtime
    yep i shoot in A mode...as well as ttl flash... but matric metering...
    but i think no diff as the face is very bright too
    i try to keep the appertures as wide as i can but the F80 will give a high notification... so i have to stop down...thus no blur effect...

    my fill flash is used not so much to light up a dark face, but rather to soften the shadows that have been cast by natural lighting...
    Have you tried shooting in manual mode and by looking at your camera's metering, stop down the flash according? Or maybe just manual mode will fill flash?

  14. #14
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    hmm i think whatever mode i were to use, if the ambient light is bright, i will have this issue...
    i can use manual mode... and overide all the cameras recommendations. but the story still stands that to large an apperture with the slow 1/125 speed will result in overexposure in bright light...

    but thats an idea for a high key lighting shoot....
    haha everything whilte and only eyebrow hair, lips will be dark. can just imagine it...

  15. #15
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    The good thing about the 80Dx is that it'll tell you if your shoots is over or under expose after taking it....

    Here's another ideal since you're using the flash only of softing the shadows... What about using the 80DX as a secondary wireless flash with omni bounce position somewhere and your F80 built in flash to trigger the 80Dx?

  16. #16
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by showtime
    hmm i think whatever mode i were to use, if the ambient light is bright, i will have this issue...
    i can use manual mode... and overide all the cameras recommendations. but the story still stands that to large an apperture with the slow 1/125 speed will result in overexposure in bright light...

    but thats an idea for a high key lighting shoot....
    haha everything whilte and only eyebrow hair, lips will be dark. can just imagine it...
    True true, I've to agree on that....

  17. #17
    Member
    Join Date
    Mar 2002
    Location
    Singapore
    Posts
    424

    Default

    Quote Originally Posted by showtime
    i think i have got you confused....
    i have a sb80... but the problem is that with the 1/125 sync speed, my apperture has to quite small to aviod overexposure... so i cannot get the nice blurry background with the portraits i shoot.

    with a sync speed of 1/500, i have 2 stops more on apperture... tada!!! more blur backgrounds!!!!!
    use a ND +4 filter?

  18. #18
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    sounds good... then have to set to manual to cancel the monitor preflash of the built in flash... if dont, the 80dx will be decieved....hehe

  19. #19
    Member
    Join Date
    Jul 2003
    Location
    Singapore, North Area
    Posts
    507

    Default

    Quote Originally Posted by wacko
    use a ND +4 filter?
    Damn, Why didn't I think of that.....

    Hahhahaha, looks like using the ND +4 would be a better ideal....

    Hehehhehehehe

  20. #20
    Member
    Join Date
    May 2003
    Location
    Singapore
    Posts
    984

    Default

    Quote Originally Posted by wacko
    use a ND +4 filter?

    oh..you have made me look silly...
    yeah!!!

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •