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Old Jun 22, 2009, 12:22 AM   #1
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Default Change min shutter with flash for 450D?

I noticed that, when I shoot with flash, use P mode, the minimal shutter speed (slowest) it automatically set to 1/60 (of course, unless it is in a very bright spot). But that can be a problem: if I use longer lens (say, 100mm, x 1.6 = 160mm), the 1/60 will sure result in a blur image.

Is there a way that I can tell the camera that don't use any slower shutter than, say 1/100?

Thanks.
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Old Jun 22, 2009, 3:51 AM   #2
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Quote:
Originally Posted by Kevin2008 View Post
I noticed that, when I shoot with flash, use P mode, the minimal shutter speed (slowest) it automatically set to 1/60 (of course, unless it is in a very bright spot). But that can be a problem: if I use longer lens (say, 100mm, x 1.6 = 160mm), the 1/60 will sure result in a blur image.
Not strictly true as if you are in a situation where there is less light by a stop or two than would give a correct exposure then even at 1/60s or a lot less the flash will still freeze the subject.

However if there is nearly the correct exposure without flash then yes there will likely be blur.

Quote:
Originally Posted by Kevin2008 View Post
Is there a way that I can tell the camera that don't use any slower shutter than, say 1/100?

Thanks.
I do nearly all my flash photography in M mode apart from in well lit conditions where I want fill flash. You can also use Tv if you want to get the shutter speed up, the only problem with that is your lens is likely to choose the widest aperture which is fine if you want that setting, using M will let you set a shutter speed and aperture that is desired. Don't forget if you set too fast a shutter speed and narrow aperture then the flash won't be able to penetrate very far.

Outside of flash photography I would suggest getting away from P mode and start investigating the functions of the camera, I'm sure this would open a whole new world of photography.

If you want advice on that please post another thread.
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Old Jul 31, 2009, 2:52 PM   #3
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Some Canon DSLRs have a custom function that let you lock the shutter speed at 1/200 with flash in Aperture Priority.
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