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10/23/2007 05:20:28 AM · #1 |
Sorry if this is a dumb question...
Last night i was playing around with some different settings in a low-light environment in my house. I selects Program mode, the exposure was perfect f3.5 1/60. When I selected fully auto - same thing, when I selected Shutter priority mode, and set the shutter speed to 1/60, still perfect as it set f3.5 as the aperture value. However, when I select aperture priority, and set the aperture to f3.5 it sets the shutter speed to 4 which was causing the exposure to obviously be very wrong. No matter what I did, I couldn't make AV expose correctly.
Any insight would be greatly appreciated. |
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10/23/2007 05:43:44 AM · #2 |
I'm working on a tutorial on this.
FOR CANON CAMERAS:
In Av mode, the camera tries to balance out the ambient light with the flash. So basically the flash is used for fill.
In P and auto mode, the camera tries to give you hand-holdable speeds (shutter/aparature speeds that you can safely hand hold your camera and get a good picture).
I'm thinking there wasn't much light around, so in Av mode, it's as if there is no flash at all. It's just used for fill.
Really, anytime I'm using my flash, I use manual mode. Unless I'm out side and I don't care, then I stick it in Av mode.
Really for a better explaination, check out PhotoNotes.org/eos-flash.
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10/23/2007 05:47:52 AM · #3 |
| Awesome! Thanks for the reply. I thought I was going crazy. Thanks for the link. |
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10/23/2007 06:09:42 AM · #4 |
Originally posted by b4cchus:
Awesome! Thanks for the reply. I thought I was going crazy. Thanks for the link. |
No problem. The photonotes is a lot of information, but once you have it down, you'll have a better understanding of how your camera works with flash. Good luck. |
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10/23/2007 06:29:44 AM · #5 |
This sounds familiar. Is it also the case with Nikons?
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10/23/2007 08:02:13 AM · #6 |
What lens were you using? Was the flash on?
Sounds like F3.5 is as wide as it goes - so in Tv mode you can pick any shutter speed you want and the camera will try to get an aperture to work - but if needs wider than the lens is capable of going it won't do it. If the flash is on then it will just use that. If not, then I believe the Aperture number in the viewfinder will flash (does on the 20/30/40 models)
Tv and Av will BOTH try to expose for the ambient light. At some point it gets below EV 10 (i think that's the value) and the camera switches over to using flash as the main light.
Message edited by author 2007-10-23 12:03:23.
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