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01/10/2005 11:57:38 PM · #1 |
I've read this section of the manual over and over and it's just not clicking. What is the difference between program (P) mode and auto mode? Aren't both like running the camera on auto pilot?
What is the difference between flexible program (P*) mode and aperture or shutter priority (A or S) mode? Aren't all of these just allowing you to choose one value and the camera chooses the other?
I can't figure out in what situation one would choose one of the above modes over the other that seems to do the same thing.
And relatedly (is that a word?), I note that all of the slow sync flash modes (slow, rear slow and redeye slow) are only available in A & P modes. I'm having a devil of a time figuring out why- particularly why they wouldn't be available in manual (M) mode!
edit: and why is rear sync only available in S and M modes?
Thanks in advance.
Message edited by author 2005-01-11 00:00:17.
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01/11/2005 12:27:35 AM · #2 |
I'll help as much as I can. Automatic mode means you have no control at all. You point the camera and the camera decides shutter and aperture.
P mode will allow you to change the settings once the camera has made them. For example, suppose the camera says the perfect exposure is F/4 at 1/500 second. If you want a different "perfect" exposure, you can then rotate the dial and it will change the shutter and aperture for you that will still give a good exposure, say to F/5.6 for 1/125.
Shutter priority lets you decide how fast the shutter will release, and will then select the appropriate aperture to give a good exposure. This comes in handy when you want to control motion in your photo, like freezing a bird in flight. You could choose 1/1000 or 1/500, and the camera will select the aperture for you. As your shutter speed increases, your aperture will be more wide open giving you less depth of field.
Aperture priority is probably used more often. You decide what aperture to use to control depth of field. You control what is in and out of focus, and the camera selects the shutter speed to give a good exposure.
Manual lets you override anything the camera selects and allows you full control of the exposure.
I have no Flash yet other than the pop-up, so you'll have to get that sync info from someone else.
Hope that helped. |
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01/11/2005 12:35:30 AM · #3 |
Yes, these basic definitions I know. But according to the manual, P* (flexible program) is the mode that will allow you to change the settings once the camera has made them. If you're in P* mode and rotate the dial to change the aperture and the camera follows suit by changing the shutter to match, how is this different than shooting in Ap priority mode?
And the flash info I'm talking about is available with the pop up flash, so you should check it out ;) Slow sync mode produces some really cool effects.
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01/11/2005 12:52:41 AM · #4 |
There isn't much difference, other than allowing you to look through the viewfinder and deciding if you want to change the setting a bit on the fly for a different effect. It's really just the automatic mode that you can modify a bit if you don't like the first choice given.
They assume that if you want to use A mode, you already know exactly what aperture you want to use or what effect you're going for with the dof. |
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01/11/2005 02:18:17 AM · #5 |
Originally posted by ahaze:
And relatedly (is that a word?), I note that all of the slow sync flash modes (slow, rear slow and redeye slow) are only available in A & P modes. I'm having a devil of a time figuring out why- particularly why they wouldn't be available in manual (M) mode!
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Because you set the shutterspeed yourself. You judge the background exposure and not the camera if you shoot manual. If it was available in M it wouldn't be M anymore.
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