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10-28-2008, 04:36 AM   #1
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EV compensation

i would like to know, when used, does it affect, speed, aperture or sensitivity.

Dave

10-28-2008, 05:15 AM   #2
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Depends which mode you're in. If you're in aperture priority mode, it will adjust the shutter speed to compensate. If you're in speed priority mode, it will adjust the aperture. Etc.
10-28-2008, 06:04 AM   #3
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QuoteOriginally posted by Matt Miller Quote
Depends which mode you're in. If you're in aperture priority mode, it will adjust the shutter speed to compensate. If you're in speed priority mode, it will adjust the aperture. Etc.
thanks, would it safe to say that in flash ev compensation it would be the same

Dave
10-28-2008, 06:41 AM   #4
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It will also adjust flash power if you're using the flash.

10-28-2008, 01:25 PM   #5
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QuoteOriginally posted by Deni Quote
It will also adjust flash power if you're using the flash.
EV Compensation does not affect flash power. On our cameras, you adjust the FEV Compensation for that.
10-28-2008, 03:51 PM   #6
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QuoteOriginally posted by AVANT Quote
EV Compensation does not affect flash power. On our cameras, you adjust the FEV Compensation for that.
so does a + flash ev increase flash output

Dave
10-28-2008, 05:16 PM   #7
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QuoteOriginally posted by AVANT Quote
EV Compensation does not affect flash power.
I can't prove it does or doesn't, but I would observe that there is really no difference between altering exposure by changing flash power versus altering it by changing aperture or sensitivity. Unless you are really trying to fine tune the balance between flash and ambient light and need explicit control of the various exposure parameters, EV compensation and FEV compensation accomplish the same thing when using flash - makes your photo darker or lighter.
10-28-2008, 05:50 PM   #8
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QuoteOriginally posted by Marc Sabatella Quote
I can't prove it does or doesn't, but I would observe that there is really no difference between altering exposure by changing flash power versus altering it by changing aperture or sensitivity. Unless you are really trying to fine tune the balance between flash and ambient light and need explicit control of the various exposure parameters, EV compensation and FEV compensation accomplish the same thing when using flash - makes your photo darker or lighter.
You can set the EV to underexpose and the flash to compensate the underexposure on your main subject. When done that way, your main subject/foreground is properly exposed and the background is underexposed, so your main subject has more "punch" than the background in daylight situation.

10-28-2008, 06:17 PM   #9
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Don't mistake Exposure Value compensation and Flash Output compensation (sometimes referred to as flash exposure compensation). They are two different things.

EV compensation allows you to increase or decrease the overall exposure determined by the camera. This is irrespective whether flash is used or not.

Flash Output compensation merely increases or throttles down the flash intensity/power. Mostly used to balance the ambient and flash exposure.
10-28-2008, 06:27 PM   #10
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i dunno about the K10D, but on the K100D, using EV resets the ISO to 200. PISSSES ME OFF TO NO END, it is the single thing i hate the absolutely friggin most about the K100D
10-28-2008, 06:58 PM   #11
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QuoteOriginally posted by k100d Quote
i dunno about the K10D, but on the K100D, using EV resets the ISO to 200. PISSSES ME OFF TO NO END, it is the single thing i hate the absolutely friggin most about the K100D
I agree That's why I rarely use it.
10-28-2008, 10:53 PM   #12
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K100d,

I just did a test to see if the ISO changed to 200 on my K100D super when changing the ev compensation. No change in ISO at all. Maybe the new firmware corrected to issue. The super uses ver 1.0. I haven't seen a revision yet. Are you using the latest revision for the K100D?

Dave

QuoteOriginally posted by k100d Quote
i dunno about the K10D, but on the K100D, using EV resets the ISO to 200. PISSSES ME OFF TO NO END, it is the single thing i hate the absolutely friggin most about the K100D
10-29-2008, 01:21 AM   #13
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On my k100d the iso doesn't reset to 200 if I use ev compensation.

And yes ev does indeed control flash power as well. You can try it yourself. Set the camera in Av mode, set the aperture and iso to a value you desire, and try with different ev (-2ev and +2ev) so the differences will be more visible.
10-29-2008, 03:48 AM   #14
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QuoteOriginally posted by k100d Quote
on the K100D, using EV resets the ISO to 200.
True, but only in Auto-ISO mode. If you set a particular ISO, say 800, it will of course stay at 800 even if EV compensation is used.
10-29-2008, 09:29 AM   #15
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QuoteOriginally posted by Class A Quote
True, but only in Auto-ISO mode.
Right. I think auto ISO is a pretty bad idea with a DSLR anyhow, this just seals the deal. Stop using auto ISO and your frustration with how it works instantly goes away, and you gain more control of your pictures. It's a win-win situation.

But FWIW, this quirk (bug) is fixed in the K200D (and presumably K20D?).
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