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07-29-2012, 11:24 AM   #1
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kM ev values in manual mode

I have just bought set of (cheap) studio lights and have been taking first set of trial portarits. I will post later when I have got more feedback on this kit. But for now I am doing nothing too elaborate, just a single light with softbox.
Problem appears to be with camera it is a Pentax kM (which I love) but when setting up portrait I chose 125thsec at F11 in manual mode - so nothing unusual I guess. However display screen shows EV at -3.0. It only shows this on manual, I've scrolled thorugh other settings to check, but it can't be right can it? I'm not even sure that it is having any effect on exposure.
I've looked through the manual and tried to find similar subjects on forums but no luck - any ideas anyone?

07-29-2012, 11:33 AM   #2
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You mean the digital K-m? Assuming your lights work like a flash, if they don't support P-TTL then the camera won't know how much lighting you'll get, so you won't be able to go by the light meter.
07-29-2012, 04:28 PM   #3
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In M mode, the Ev meter will ignore the flash. It's showing you the results you'd get with just that 1/125s f11 exposure are 3 stops underexposed. Probably more but the K-m display maxes out at 3 stops. It can be useful information. It's a meter reading in M mode, not a bias to an automatic mode like you'd see in Av or another mode. I guess the idea is, in M mode you ought to know what you're doing.

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