K-50 green button manual mode

bluestringer · 07-28-2016, 10:45 AM

I can't seem to figure out what the green button does in M mode. On my K-5 it sets the proper exposure, but on the K-50 it doesn't seem to do that. Also when in M mode, manual lens, I can't get the exposure meter to move either way. What am I doing wrong.

freddyisaac · 07-28-2016, 11:05 AM

Probably a silly question but what are your e-dial settings for M mode on the K-50 (Pshift,Tav or Av) ?

**UncleVanya** · 07-28-2016, 11:49 AM

The green button on a K-50 in Manual mode simply moves the shutter speed to the program line setting for the amount of light you have. This then allows you to manually adjust the setting from there. Unless I have totally forgotten how it works. The DOF preview is the way to get the meter I thought - but I think that only works on flagship bodies like the K-5, K-3, etc.

bluestringer · 07-28-2016, 12:09 PM

The manual says the meter is supposed to work when in M mode to give the proper exposure, but I can't get it to move. So the green button is just a DOF preview?

**UncleVanya** · 07-28-2016, 12:13 PM

Originally posted by bluestringer

The manual says the meter is supposed to work when in M mode to give the proper exposure, but I can't get it to move. So the green button is just a DOF preview?

No - I'm not saying that. Press Green Button - shutter speed should adjust to match the program line exposure for the amount of light the sensor sees. The aperture should stop down during this button press - so the camera is measuring the light with the aperture at your desired setting - and setting the shutter speed to match. Then you can adjust the shutter speed or aperture as you wish to change the exposure. You can also (I think) use EV compensation for under/overexposure consistently applied.

DOF preview does similar things but I thought it brought up the meter bar (on flagships) and allowed you to use the camera slightly differently.

bluestringer · 07-28-2016, 12:28 PM

Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks.

**UncleVanya** · 07-28-2016, 01:04 PM

Originally posted by bluestringer

Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks.

Yes an A series lens allows the camera to control aperture and it knows what the setting is so it fully meters. There appears to be some variability of exposure and many people find they need to adjust exposure slightly when using either type of metering.

stevebrot · 07-28-2016, 01:12 PM

Originally posted by bluestringer

Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks.

It should work as described above. I don't have a K-50 next to me at the moment, but I can assure you that stop-down/green button metering is available and does work on your camera, both with K-mount and adapted M-42 lenses. I have used the K-50 with both.

Did you set the menu option for "Using Aperture Ring" to "enable"?

Steve

stevebrot · 07-28-2016, 01:21 PM

Originally posted by stevebrot

Did you set the menu option for "Using Aperture Ring" to "enable"?

Also, the green button action in M mode should be changed to "Tv Shift" from the default of "P Line". See the manual p164-166.

Turn off auto-ISO. I am not sure (no camera in front of me), but I believe that M mode will default to Av mode if using an aperture ring and ISO is auto. In
that case, the green button will do nothing and the lens will remain wide open even at exposure time.

Steve

bluestringer · 07-28-2016, 02:00 PM

Yes, it works as stated now. I just could not figure it out because it works different than my K-5. Yes, you have to have auto ISO off for M mode or it will default to TAv mode. Thanks.

KDD · 07-28-2016, 02:45 PM

I have my k-50. Yes green button on top of the body. On right button.

K10d, k20d k-7 k-3 k-5 on back of the body.

Not a Number · 07-29-2016, 08:18 AM

Originally posted by KDD

K10d, k20d k-7 k-3 k-5 on back of the body.

Eh? The green button is on top to the left of the shutter button on my K10D.

07-28-2016, 10:45 AM	#1
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748	K-50 green button manual mode I can't seem to figure out what the green button does in M mode. On my K-5 it sets the proper exposure, but on the K-50 it doesn't seem to do that. Also when in M mode, manual lens, I can't get the exposure meter to move either way. What am I doing wrong.

07-28-2016, 01:21 PM	#9
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by stevebrot Did you set the menu option for "Using Aperture Ring" to "enable"? Also, the green button action in M mode should be changed to "Tv Shift" from the default of "P Line". See the manual p164-166. Turn off auto-ISO. I am not sure (no camera in front of me), but I believe that M mode will default to Av mode if using an aperture ring and ISO is auto. In that case, the green button will do nothing and the lens will remain wide open even at exposure time. Steve Last edited by stevebrot; 07-28-2016 at 02:19 PM.

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07-28-2016, 11:05 AM	#2
freddyisaac Forum Member Join Date: Dec 2015 Posts: 81	Probably a silly question but what are your e-dial settings for M mode on the K-50 (Pshift,Tav or Av) ?

07-28-2016, 11:49 AM	#3
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,400	The green button on a K-50 in Manual mode simply moves the shutter speed to the program line setting for the amount of light you have. This then allows you to manually adjust the setting from there. Unless I have totally forgotten how it works. The DOF preview is the way to get the meter I thought - but I think that only works on flagship bodies like the K-5, K-3, etc.

07-28-2016, 12:09 PM	#4
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	The manual says the meter is supposed to work when in M mode to give the proper exposure, but I can't get it to move. So the green button is just a DOF preview?

07-28-2016, 12:13 PM	#5
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,400	Originally posted by bluestringer The manual says the meter is supposed to work when in M mode to give the proper exposure, but I can't get it to move. So the green button is just a DOF preview? No - I'm not saying that. Press Green Button - shutter speed should adjust to match the program line exposure for the amount of light the sensor sees. The aperture should stop down during this button press - so the camera is measuring the light with the aperture at your desired setting - and setting the shutter speed to match. Then you can adjust the shutter speed or aperture as you wish to change the exposure. You can also (I think) use EV compensation for under/overexposure consistently applied. DOF preview does similar things but I thought it brought up the meter bar (on flagships) and allowed you to use the camera slightly differently.

07-28-2016, 12:28 PM	#6
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks.

07-28-2016, 01:04 PM	#7
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,400	Originally posted by bluestringer Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks. Yes an A series lens allows the camera to control aperture and it knows what the setting is so it fully meters. There appears to be some variability of exposure and many people find they need to adjust exposure slightly when using either type of metering.

07-28-2016, 01:12 PM	#8
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by bluestringer Ok. That makes sense. But apparently the meter does not work if you are using a manual lens with no A setting. I switched to one with the A setting and the meter worked. But I can use the green button like you stated to get proper exposure. Thanks. It should work as described above. I don't have a K-50 next to me at the moment, but I can assure you that stop-down/green button metering is available and does work on your camera, both with K-mount and adapted M-42 lenses. I have used the K-50 with both. Did you set the menu option for "Using Aperture Ring" to "enable"? Steve

07-28-2016, 02:00 PM	#10
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	Yes, it works as stated now. I just could not figure it out because it works different than my K-5. Yes, you have to have auto ISO off for M mode or it will default to TAv mode. Thanks.

07-28-2016, 02:45 PM	#11
KDD Veteran Member Join Date: Sep 2013 Photos: Gallery \| Albums Posts: 403	I have my k-50. Yes green button on top of the body. On right button. K10d, k20d k-7 k-3 k-5 on back of the body.

07-29-2016, 08:18 AM	#12
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Originally posted by KDD K10d, k20d k-7 k-3 k-5 on back of the body. Eh? The green button is on top to the left of the shutter button on my K10D.

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