Compact High Speed Flash Sync


Jun 18, 2005
394
0
0
#1
Hi, I've noticed that it is possible to use forced flash on compact cameras in bright daylight, even at very high shutter speeds. How is this possible on a compact camera when even DSLRs commonly top out at 1/250s?
 

daredevil123

Moderator
Staff member
Oct 25, 2005
21,636
59
48
lil red dot
#2
Hi, I've noticed that it is possible to use forced flash on compact cameras in bright daylight, even at very high shutter speeds. How is this possible on a compact camera when even DSLRs commonly top out at 1/250s?
1/250 max sync speed is a limit due to mechanical shutter curtain...

compact cameras have no shutter.
 

Last edited:

agws1970

New Member
Sep 9, 2002
365
0
0
47
North East Singapore
Visit site
#4
1/250 max sync speed is a limit due to mechanical shutter curtain...

compact cameras have no shutter.
It's not that compact cameras have no shutter. They run Leaf Shutters which are in line with the optics in their lenses. Leaf shutters have almost no limit to sync speeds, notice I say almost. The shutters in most if not all DSLR's are what are known as Focal Plane Shutters which have the theoretical limit of 1/250"s. HSS enables cameras can shoot up to 1/4000's.
 

daredevil123

Moderator
Staff member
Oct 25, 2005
21,636
59
48
lil red dot
#5
It's not that compact cameras have no shutter. They run Leaf Shutters which are in line with the optics in their lenses. Leaf shutters have almost no limit to sync speeds, notice I say almost. The shutters in most if not all DSLR's are what are known as Focal Plane Shutters which have the theoretical limit of 1/250"s. HSS enables cameras can shoot up to 1/4000's.
My understanding is that some cameras employ sensor 'gating' to control the exposure time. And there are definitely quite a number of cameras that are using this instead of leaf shutters.
 

agws1970

New Member
Sep 9, 2002
365
0
0
47
North East Singapore
Visit site
#6
My understanding is that some cameras employ sensor 'gating' to control the exposure time. And there are definitely quite a number of cameras that are using this instead of leaf shutters.
Pray tell which models. As I understand, these are used currently in lower end models and I don't know if they allow forced flash with these lower end models. The Pana GH2 is currently to be released soon without a shutter but that is hardly low end though it is compact. I really don't know of any others that are shutterless.
 

Diavonex

Senior Member
Sep 23, 2008
3,641
0
0
Admiralty
#7
From what I've read, compact camera uses electronic shutters (there's no moving parts).

Electronic shutter turns on the image sensor to begin recording the exposure and turns it off to end it.

That's how they can achieve high speed sync.
 

daredevil123

Moderator
Staff member
Oct 25, 2005
21,636
59
48
lil red dot
#8
Pray tell which models. As I understand, these are used currently in lower end models and I don't know if they allow forced flash with these lower end models. The Pana GH2 is currently to be released soon without a shutter but that is hardly low end though it is compact. I really don't know of any others that are shutterless.
Handphone cameras for one.
 

Jun 18, 2005
394
0
0
#11
Thank you all for your responses, it seems like the answer would be PnS cameras employing electronic shutters.