Outdoor Flash Problem


LFC25

New Member
Mar 20, 2011
199
0
0
#1
Hi guys,

Need your help on this:

I was taking a portrait shot under a bright sky in A-priority mode. The meter reading was f/3.5, 1/1000 secs, ISO 100.

Image taken. The sky was ok but the model was under-exposed.

So I use a fill-in flash but the flash max sync speed can only go upto 1/200 secs. If I use this speed the sky will be over-exposed this time.

I switched to Manual mode and set the camera speed to 1/200 secs. It gives me a aperture of f/11 (large DOF) which I do not want.

Can anyone enlighten me how can I maintain f/3.5 within the flash max sync speed in this kind of situation?

Thanks in advance.
 

catchlights

Moderator
Staff member
Sep 27, 2004
21,903
46
48
Punggol, Singapore
www.foto-u.com
#2
Hi guys,

Need your help on this:

I was taking a portrait shot under a bright sky in A-priority mode. The meter reading was f/3.5, 1/1000 secs, ISO 100.

Image taken. The sky was ok but the model was under-exposed.

So I use a fill-in flash but the flash max sync speed can only go upto 1/200 secs. If I use this speed the sky will be over-exposed this time.

I switched to Manual mode and set the camera speed to 1/200 secs. It gives me a aperture of f/11 (large DOF) which I do not want.

Can anyone enlighten me how can I maintain f/3.5 within the flash max sync speed in this kind of situation?

Thanks in advance.
you can't go beyond max sync speed unless your camera and flash support high speed sync.

another way to work around is use ND filter over your lens, it will bring down shutter speed to max sync speed, but it will also decrease the flash light reaching the sensor, you may need more powerful flash.

hope this help.
 

LFC25

New Member
Mar 20, 2011
199
0
0
#3
Thanks for your reply, catchlights :)
 

Cowseye

Senior Member
Mar 7, 2010
3,786
0
0
Singapore
www.ttlo-cowseye.com
#4
You can also do 2 exposures, one for the sky one for the subject, then use photoshop, stacking the subject exposure over the other, and use layer mask to hide the entire later, then reveal only the subject. May not look as nice as a ND filter shot with flash but at least it won't cost you a cent. (assuming you have the necessary software)
 

LFC25

New Member
Mar 20, 2011
199
0
0
#5
yes, that's a good idea. Will give it a try.

Thanks, Cowseye :)
 

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