| Author | Thread |
|
|
11/01/2006 04:26:49 PM · #1 |
| When shooting outdoor portraits in Av mode it has been suggested that I should set my flash to high to high speed sync so that any shutter speed can be used. The question that comes to my mind is: When would you NOT want to use high-speed sync? I do not see any possible draw backsâ€Â¦ |
|
|
|
11/01/2006 04:29:09 PM · #2 |
| High speed sync seriously limits the range of the flash. That is probably the biggest drawback to its use. |
|
|
|
11/01/2006 04:30:37 PM · #3 |
High speed flash works differently to 'normal' speed flash.
Basically in 'high speed' mode the flash is on for a longer period of time, than in normal sync mode.
In normal sync mode, the flash fires either at the start (first curtain sync) or end (second curtain sync) of the exposure. So it tends to stop motion. With high speed sync, the flash outputs at a lower power setting for a longer period of time (yes, I know it sounds backwards). This continual light mode of the flash avoids synchronisation issues with the camera shutter. This also reduces the range of the flash, as it is lower power over a longer period of time, rather than one very bright flash.
Short story, long: High speed sync mode doesn't let you stop motion in the same way that normal flash sync does.
Message edited by author 2006-11-01 16:31:59.
|
|
|
|
11/01/2006 04:45:55 PM · #4 |
Thank you Jemison and Gordon.
Gordon - here is my basic understanding then - let me know what you think. BTW - I have the 530EX
High speed sync - I will use this when shooting portraits out doors at a short distance (under 6-10 feet).
Second Curtain sync - I will use this when I want to allow motion blur but want the last bit to be in focus without any blur after stopping.
Normal - in every other situation.
Thank you (all) again.
Message edited by author 2006-11-02 11:17:29. |
|
|
|
11/01/2006 04:48:11 PM · #5 |
Originally posted by Gordon:
High speed flash works differently to 'normal' speed flash.
Basically in 'high speed' mode the flash is on for a longer period of time, than in normal sync mode.
In normal sync mode, the flash fires either at the start (first curtain sync) or end (second curtain sync) of the exposure. So it tends to stop motion. With high speed sync, the flash outputs at a lower power setting for a longer period of time (yes, I know it sounds backwards). This continual light mode of the flash avoids synchronisation issues with the camera shutter. This also reduces the range of the flash, as it is lower power over a longer period of time, rather than one very bright flash.
Short story, long: High speed sync mode doesn't let you stop motion in the same way that normal flash sync does. |
my hero ;) at last an explanation that I understand. |
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/01/2025 02:46:56 AM EDT.
