EV compensation

dafiryde · 10-28-2008, 04:36 AM

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

Dave

Matt Miller · 10-28-2008, 05:15 AM

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.

dafiryde · 10-28-2008, 06:04 AM

Originally posted by Matt Miller

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

Deni · 10-28-2008, 06:41 AM

It will also adjust flash power if you're using the flash.

AVANT · 10-28-2008, 01:25 PM

Originally posted by Deni

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.

dafiryde · 10-28-2008, 03:51 PM

Originally posted by AVANT

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

Marc Sabatella · 10-28-2008, 05:16 PM

Originally posted by AVANT

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.

flyer · 10-28-2008, 05:50 PM

Originally posted by Marc Sabatella

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.

creampuff · 10-28-2008, 06:17 PM

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.

k100d · 10-28-2008, 06:27 PM

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

Oldschool · 10-28-2008, 06:58 PM

Originally posted by k100d

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.

Big Dave · 10-28-2008, 10:53 PM

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

Originally posted by k100d

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

Deni · 10-29-2008, 01:21 AM

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.

Class A · 10-29-2008, 03:48 AM

Originally posted by k100d

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.

Marc Sabatella · 10-29-2008, 09:29 AM

Originally posted by Class A

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?).

10-28-2008, 04:36 AM	#1
dafiryde Veteran Member Join Date: Nov 2007 Location: Trinidad and Tobago Posts: 419	EV compensation i would like to know, when used, does it affect, speed, aperture or sensitivity. Dave

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10-28-2008, 05:15 AM	#2
Matt Miller Veteran Member Join Date: May 2007 Location: Cambridge, Iowa Photos: Gallery Posts: 339	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
dafiryde Veteran Member Join Date: Nov 2007 Location: Trinidad and Tobago Posts: 419 Original Poster	Originally posted by Matt Miller 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
Deni Veteran Member Join Date: May 2007 Location: Tirana, Albania, South Europe, Planet Earth Photos: Gallery \| Albums Posts: 621	It will also adjust flash power if you're using the flash.

10-28-2008, 01:25 PM	#5
AVANT Veteran Member Join Date: Jun 2007 Location: California Posts: 426	Originally posted by Deni 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
dafiryde Veteran Member Join Date: Nov 2007 Location: Trinidad and Tobago Posts: 419 Original Poster	Originally posted by AVANT 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
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by AVANT 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
flyer Veteran Member Join Date: Jan 2008 Location: Ste-Anne des Plaines, Qc., Canada Posts: 2,013	Originally posted by Marc Sabatella 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
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	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
k100d Veteran Member Join Date: Feb 2008 Location: Toronto Posts: 3,911	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
Oldschool Pentaxian Join Date: Jun 2007 Location: Central NJ Posts: 1,278	Originally posted by k100d 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
Big Dave Veteran Member Join Date: Jan 2008 Location: San Antonio, Texas Photos: Gallery Posts: 547	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 Originally posted by k100d 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
Deni Veteran Member Join Date: May 2007 Location: Tirana, Albania, South Europe, Planet Earth Photos: Gallery \| Albums Posts: 621	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
Class A Pentaxian Join Date: Aug 2008 Location: Wellington, New Zealand Posts: 11,251	Originally posted by k100d 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
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by Class A 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?).