Large aperture in bright daylight /w flash


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justanut

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Dec 4, 2007
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#1
While experimenting with using flash outdoors in daylight, I came across this problem... With flash the highest shutter speed I can go is 250, which means that even at ISO100 I will not be able to use my lens wide open or even 2-3 stops down. This is a bummer when I want a shallow DOF.

Is using a ND filter the only way? Is IQ affected usually? What about using 2 x polarizers?
 

Dream Merchant

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Jan 11, 2007
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#2
Doesn't matter what one uses as long as it cuts the amount of light going through the lens. With or without distortions is a different issue.
 

justanut

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Dec 4, 2007
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#3
Oh... I was thinking 2 x polarizers cos will allow me to change the amount of light by twisting them... Can save on buying the various ND filters... But then again 2 pieces of dual piece glass which costs more than double that of one ND filter... maybe buy ND filter still better choice lol
 

Zohan

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Jun 15, 2008
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#4
While experimenting with using flash outdoors in daylight, I came across this problem... With flash the highest shutter speed I can go is 250, which means that even at ISO100 I will not be able to use my lens wide open or even 2-3 stops down. This is a bummer when I want a shallow DOF.

Is using a ND filter the only way? Is IQ affected usually? What about using 2 x polarizers?
your 580ex flash should be able to give you high speed flash > 1/250. check your manual.
 

Jul 31, 2006
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#6
As I know, 580EX has a "hight speed" mode, which allow you to should with flash focal plane syncronize, therefore, you are not restricted below the flash syncrozine speed anymore.
 

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