Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-28-2016, 10:45 AM   #1
Pentaxian
bluestringer's Avatar

Join Date: Nov 2011
Location: Cotton fields of South Georgia
Photos: Gallery | Albums
Posts: 2,429
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, 11:05 AM   #2
Forum Member




Join Date: Dec 2015
Posts: 79
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
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 9,750
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
Pentaxian
bluestringer's Avatar

Join Date: Nov 2011
Location: Cotton fields of South Georgia
Photos: Gallery | Albums
Posts: 2,429
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
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 9,750
QuoteOriginally posted by bluestringer Quote
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
Pentaxian
bluestringer's Avatar

Join Date: Nov 2011
Location: Cotton fields of South Georgia
Photos: Gallery | Albums
Posts: 2,429
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
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 9,750
QuoteOriginally posted by bluestringer Quote
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
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,885
QuoteOriginally posted by bluestringer Quote
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, 01:21 PM   #9
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,885
QuoteOriginally posted by stevebrot Quote
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.
07-28-2016, 02:00 PM   #10
Pentaxian
bluestringer's Avatar

Join Date: Nov 2011
Location: Cotton fields of South Georgia
Photos: Gallery | Albums
Posts: 2,429
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: 330
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
Pentaxian
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 4,108
QuoteOriginally posted by KDD Quote
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.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
button, exposure, k-30, k-50, k-50 green button, mode, pentax k30, pentax k50
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax Manual Lens ignored aperture in Av mode (green button) manufocus Troubleshooting and Beginner Help 7 06-19-2015 02:06 PM
K-50 green Button in Manual Mode not working PaulAsahi Pentax K-30 & K-50 8 09-01-2014 04:09 AM
Why the green button in manual mode? geekette Pentax DSLR Discussion 5 05-05-2011 12:01 PM
[K10D] {Manual Mode} Green Button with flash AVANT Pentax DSLR Discussion 6 07-13-2007 12:34 PM
K/M Lenses, Manual Mode and the Green Button Sailor Pentax DSLR Discussion 14 02-15-2007 10:48 AM



All times are GMT -7. The time now is 05:37 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top