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Old Feb 27, 2006, 6:49 PM   #11
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P mode shift does not work when using flash. You can only shift P mode if the flash is off... The camera will set shutter speed somewhere at or over 1/60 to avoid camera shake, but you can't change it or aperture if you are using flash. Take some time to understand flash in the different modes, but you will probably end up using manual, since it gives you the most control over all the variables, yet still end up with a properly exposed pic! :|

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Old Feb 27, 2006, 6:57 PM   #12
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I am not familiar with "P mode shift"--Please what does it mean?
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Old Feb 27, 2006, 9:22 PM   #13
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That where you adjust the shutter speed or aperture up or down from the "program" and the camera compensates the other for proper exposure. It gives you some creative control in Program mode. But you can't do that when the flash is active. You are stuck with the combination of shutter and apperture that the camera suggests...

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Old Feb 27, 2006, 9:45 PM   #14
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bigboyhf wrote:
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That where you adjust the shutter speed or aperture up or down from the "program" and the camera compensates the other for proper exposure. It gives you some creative control in Program mode. But you can't do that when the flash is active. You are stuck with the combination of shutter and apperture that the camera suggests...
"P mode shift does not work when using flash" - It does work too!


Again it's because of your flash default setting :idea:

-> Enable High-Speed sync on the flash and see how you can adjust the shutter speed and aperture in the Program mode (past the FP sync shutter speed)... of course you need to be in bright light to do this otherwise the EV value is not high enough for the camera to perform its automation :G

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Old Feb 27, 2006, 10:16 PM   #15
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This has been quite a learning experience for me. I really appreciate everyone's input on this topic. Thanks for taking the time. I have to shoot a lacrosse game on Wednesday night and will try manual mode.
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Old Feb 27, 2006, 10:47 PM   #16
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NHL...

According to the 20D manual pg 75, program shift doesn't work with flash. I just pulled out my camera and 580 flash and pointed it at my ceiling light with high speed sync enabled and it would not adjust in program mode. The shutter speed went to 250 which is the max for P mode and normal flash. When I bumped up the ISO, the high speed sync icon was lit in the viewfinder and the shutter speed was allowed higher than 250, but still would not shift. Of course, the on-camera flash is not able to sync above 250 so you need an external flash with that capability to get a shutter speed any higher than 250. But as far as I can tell, it will not shift even with high speed sync enabled.

Either I'm doing something wrong, or we are not talking about the same thing?

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Old Feb 28, 2006, 6:07 AM   #17
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bigboyhf

I stand corrected by what the manual says... about "shifting"

The internal flash do not have high-speed sync capability (hence it constrained the shutter selection); However, like you I was able to adjust the the shutter speed (or aperture) way pass 1/250s while the EV indicator stay constant with an external flash

I don't know what this function is called then... but we are both "altering" the Program mode along a strainght EV curve! :-)
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Old Feb 28, 2006, 5:41 PM   #18
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No problem... Even though I do use Manual for most flash pics now, I will still occasionally use P mode when I find myself needing to set up fast to get a quick shot with or without the flash. It's nice to be able to shift the aperture/speed settings as the camera program tends to keep the aperture wide in most cases. Aparently when you are using a flash, you don't have that option.

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