Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
9 Likes  
The Usage of Green Button
Posted By: vizjerei, 05-13-2009, 07:38 AM

The following are copy from several different user's post.
Hopefully this can help more newcomers (or not) to know more about the great Green Button.
Thanks to Peter Zack, RuiC, sezme.

In manual mode (A,FA, DA etc series lens) you can push the button and it sets the exposure for the program mode and the program line. Program line is the setting you have selected in the camera menus, like MTF (where the camera sets the lens at the best aperture for that lens, which is programmed into the lens by the manufacturer). Then you can fine tune the exposure to your liking from this setting. Very old school but an absolute requirement for a serious shooter in tough lighting and many other situations. (Peter Zack)

Step Down Metering
With an M or M42 lens, you can use the button to stop the lens down and take a meter reading. For those that own these lenses, it's an approximate reading and you have to understand (with practice) the way your particular lens will meter on the attached body. In most cases, these lenses meter well wide open but tend to over expose in middle apertures. So you use the green setting recommendations as a starting place to adjust to the correct exposure. (Peter Zack)

Return to HyperProgram(P) after changes
In HyperProgram (P) mode you can turn the front e-dial to adjust exposure time other than P suggests and it changes to Tv mode. If you turn the rear e-dial it becomes Av mode. Then press Green-button it returns to P mode again. (RuiC)
image from Digiichi - Next generation hyperprogram.

From Full Manual mode to P, Av or Tv
The green button in M mode get you to P, Av or Tv dependant on what mode is chosen in the green button menu set up. (excellent if you want to use it like an on-demand spot-meter)

The green button doesn't change from M (manual) mode to any other mode - it leaves you in M mode. It just momentarily gives you the effect of being in one of those other modes (which one depends on how you've set it up in your custom options) - setting the same aperture and/or shutter speed that you'd get it you were in one of those other modes, but then leaving that set. As opposed to constantly readjusting as the light changes.

(thanks lol101, Marc Sabatella, adwb)

Act as Reset button: Reset Exposure Compensation, Flash Compensation
If you have set exposure compensation, hold the exposure compensation button plus the green button will reset the meter to zero E.C.
* You can also reset the Flash Compensation with green button. (thanks rockmaster1964)

Fast access to set Auto ISO
if you press the ISO button (OK button on K10/20) plus the green button, it sets ISO to auto. A very useful button!
Also in Av/Tv if ISO is made accessible via one of the control dial, green button switches to auto-ISO. (thanks lol101)

Zoom in in Playback mode
In playback, after you zoom, Green button zooms IN and EV+- zooms OUT

Last edited by vizjerei; 02-20-2010 at 07:53 PM.
Views: 104,269
02-03-2010, 06:14 AM   #31
Pentaxian
adwb's Avatar

Join Date: Sep 2009
Location: Bristol UK
Photos: Gallery
Posts: 1,631
QuoteOriginally posted by vizjerei Quote
From Full Manual mode to P, Av or Tv
The green button in M mode get you to P, Av or Tv punctually (excellent if you want to use it like an on-demand spot-meter) (thanks lol101)
sorry if this is a dumb question, is the above when in manual mode ?
and
with a full manual lens the green button only selects the speed to the aperture selected manually on the lens and nothing else is that correct?
and
what are the function/s available when in manual mode using an A series lens?


Last edited by adwb; 02-03-2010 at 06:47 AM. Reason: bad grammar
02-03-2010, 06:32 AM   #32
Inactive Account




Join Date: Nov 2008
Location: USA
Posts: 924
I'm curious as to how an M42 lens gets stopped down by the camera. There is no mechanical linkage.
02-03-2010, 09:12 AM   #33
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by adwb Quote
sorry if this is a dumb question, is the above when in manual mode ?
I think it was worded a bit misleadingly. The green button doesn't change from M (manual) mode to any other mode - it leaves you in M mode. It just momentarily gives you the effect of being in one of those other modes (which one depends on how you've set it up in your custom options) - setting the same aperture and/or shutter speed that you'd get it you were in one of those other modes, but then leaving that set. As opposed to constantly readjusting as the light changes.

QuoteQuote:
with a full manual lens the green button only selects the speed to the aperture selected manually on the lens and nothing else is that correct?
Correct, since aperture can't be controlled by the camera. I suppose it conceivable some model might be configurable to adjust ISO instead, but I don't think any current mdoels do that.

QuoteQuote:
what are the function/s available when in manual mode using an A series lens?
Exactly what I just described above - you get to choose in the custom menu whether you want the Green button to set shutter speed, aperture, or both. When you hit the Green button, it will set the selected parameter(s) based on the meter reading at that moment, and then leave it set. Not just "A" lenses, but also F, FA, DA, etc - any lens where the camera can control aperture. But I have my Green button set to adjust shutter speed only, since that's how it works for manual lenses anyhow, and I like my camera to work as consistently as possible.
02-04-2010, 03:31 AM   #34
Pentaxian
adwb's Avatar

Join Date: Sep 2009
Location: Bristol UK
Photos: Gallery
Posts: 1,631
QuoteOriginally posted by Marc Sabatella Quote
I think it was worded a bit misleadingly. The green button doesn't change from M (manual) mode to any other mode - it leaves you in M mode. It just momentarily gives you the effect of being in one of those other modes (which one depends on how you've set it up in your custom options) - setting the same aperture and/or shutter speed that you'd get it you were in one of those other modes, but then leaving that set. As opposed to constantly readjusting as the light changes..
Thanks mark, that is what I found but despite having had my K10 for a year I thought I knew my camera but I keep reading "The green button in M mode get you to P, Av or Tv punctually (excellent if you want to use it like an on-demand spot-meter)" and thinking I was missing something.
perhaps the wording needs changing to:
"The green button in M mode get you to P, Av or Tv dependant on what mode is chosen in the green button menu set up. (excellent if you want to use it like an on-demand spot-meter)"

QuoteOriginally posted by Marc Sabatella Quote
Correct, since aperture can't be controlled by the camera. I suppose it conceivable some model might be configurable to adjust ISO instead, but I don't think any current models do that.
.
Thank you


QuoteOriginally posted by Marc Sabatella Quote
Exactly what I just described above - you get to choose in the custom menu whether you want the Green button to set shutter speed, aperture, or both. When you hit the Green button, it will set the selected parameter(s) based on the meter reading at that moment, and then leave it set. Not just "A" lenses, but also F, FA, DA, etc - any lens where the camera can control aperture. But I have my Green button set to adjust shutter speed only, since that's how it works for manual lenses anyhow, and I like my camera to work as consistently as possible.
Again thank you, I don't know how you find the time to read and comment on so many posts but it is for me always very much appreciated
regards
Alistair

02-10-2010, 10:01 PM   #35
New Member




Join Date: Feb 2010
Posts: 5
QuoteOriginally posted by jhilla Quote
The plethora of options for the famous green button are endless. You'd be surprised at the ability to customize the green button. I'm at work and I can't indulge all the options but for those of you with a K-x, turn on your camera, push menu, cycle to the right maybe 4 or 5 pages and you'll notice "Green Button", push the arrow and enjoy!

I like the preview shot option, where the green button takes a preview of how the shot will look like without saving the pic. This is really helpful for rookies like myself, I took several shots of these Howler Monkeys when I was in Mexico. Not until we stopped shooting to look back at our shots and mine were either way too dark or under exposed.

I'm sorry my detail instructions might be a off, I don't have my cam in front of me. I've read my manual back and forth and I wondered what this green button did cause my girlfriend's T1i has no such thing and I mean what good is a button if you don't know what it does.

my two cents

-Jon
I am new to all this and k-x. I will need to read more on this green button from the manual.

02-20-2010, 07:50 PM   #36
Veteran Member
vizjerei's Avatar

Join Date: May 2007
Location: Toronto
Photos: Gallery
Posts: 1,418
Original Poster
Thanks Marc Sabatella and adwb, I have updated the "From Full Manual mode to P, Av or Tv " section with your explanation. It will be more clear for others from now on
04-14-2010, 10:21 AM   #37
Inactive Account




Join Date: Apr 2010
Location: Massachusetts
Posts: 12
Thanks Gret info.
04-19-2010, 01:07 AM   #38
New Member




Join Date: Apr 2010
Location: United States
Posts: 4
on demand spot meter?

Can someone explain the on-demand spot meter concept? I'm familiar with spot metering, and don't understand why you would need to switch out of M mode to spot meter. I just got my KX last night and I'm still reading through the manual. (after years of shooting Nikon(F4 F5 N90), Canon (20d), and recently Leica (digilux 2), I picked a $700 "beginner's camera" because it blew away anything I compared it to and I could buy into the system for a ridiculously low cost)

04-19-2010, 02:55 AM   #39
Pentaxian
Moderator Emeritus




Join Date: May 2007
Location: Edmonton Alberta, Canada
Photos: Gallery | Albums
Posts: 10,648
Welcome to the forums. I don't understand your question. Spot metering works in (M) Msnual mode full time. There's no need to 'switch out of manual' mode to spot meter. Just turn the camera on, hit the info button twice to get to the status screen (shows things like AFS, File settings (RAW, RAW +, Jpeg) AF pint select etc.) and select metering mode, You have 3 choices: 1) Multi, 2) center weighted and spot. Choose spot metering and it stays in that mode all the time, even if you change shooting modes.

The only other selection is the length of time the meter is on. There are 3 settings of 3 seconds, 10 sec and 30 sec. These are just power save modes and put the camera in sleep mode to save power. Push any button and the camera wakes up in the mode you last used it in which also includes spot metering mode in M.
04-19-2010, 04:12 AM   #40
New Member




Join Date: Apr 2010
Location: United States
Posts: 4
Peter,
Yeah that's what I figured. I kept reading posts talking about the green button function as an on-demand spot meter and wasn't sure what they meant.
04-19-2010, 08:03 AM   #41
Pentaxian
Moderator Emeritus




Join Date: May 2007
Location: Edmonton Alberta, Canada
Photos: Gallery | Albums
Posts: 10,648
Coming from any other brand, the Green button is a bit of a mystery. We love it and it has a bunch of useful functions. Well worth studying on the K-x. it works a little differently on this body and is more programmable. Great with older lenses (M42, K and M mounts etc). It's not on a Canon, Nikon, Sony, Oly or Pana body.
04-19-2010, 08:11 AM   #42
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,134
QuoteOriginally posted by sgilder Quote
Peter,
Yeah that's what I figured. I kept reading posts talking about the green button function as an on-demand spot meter and wasn't sure what they meant.
Those postings were with reference to using lenses that do not have an "A" position on the aperture ring. Those lenses can only be used in manual exposure mode or in Av mode, when the lens will always be wide open. The green button can be used to set the camera's idea of the best shutter speed to match the aperture you have set on the lens, using the program line you have set in the menus. Some models use the AE button instead of the green button.

Spot metering is something completely different, and you can use it in any camera mode, M or P or Av or Tv or TAv or whatever.

One caution to be noted is that the multi-pattern metering is only available to a lens that is set to "A" aperture. Any lens without an aperture ring is automatically in "A". If you have pattern metering set, and the lens is set to a specific aperture on the lens the camera will change it to centre weighted metering.

Frankly, I see no reason to ever use the aperture ring on the lens if the lens has an "A" position. You set it using the camera controls instead, and you can see what you are doing in the viewfinder. You don't have to remove the camera from your eye to see what is set on the lens.
04-20-2010, 08:32 PM   #43
Forum Member




Join Date: Jan 2010
Posts: 53
From Full Manual mode to P, Av or Tv
The green button in M mode get you to P, Av or Tv dependant on what mode is chosen in the green button menu set up. (excellent if you want to use it like an on-demand spot-meter)

The green button doesn't change from M (manual) mode to any other mode - it leaves you in M mode. It just momentarily gives you the effect of being in one of those other modes (which one depends on how you've set it up in your custom options) - setting the same aperture and/or shutter speed that you'd get it you were in one of those other modes, but then leaving that set. As opposed to constantly readjusting as the light changes.

How di I miss this in the manual??
04-27-2010, 01:27 PM   #44
Inactive Account




Join Date: Apr 2010
Location: Michigan
Posts: 15
QuoteOriginally posted by bogiesbad Quote
A wonderful button...and green to boot. Thanks for making this a sticky.
When all else fails, I put my K20D in Green Mode, and I can usually get something acceptable to work with.
05-03-2010, 04:00 PM   #45
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,218
K-x users:

In M mode with a manual lens, the AV button sets the correct shutter speed based on the aperture you select on the lens's ring.

You don't need the Green button for this, and can assign it another function.

Last edited by Ira; 05-05-2010 at 11:55 AM.
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, camera, changes, compensation, exposure, iso, lens, meter, mode, pentax help, photography, reset, thanks
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Green button - who really uses it? jpzk Troubleshooting and Beginner Help 45 01-07-2011 01:59 PM
Green button fekish Troubleshooting and Beginner Help 4 10-06-2010 03:33 PM
SR and green button slow2focus Troubleshooting and Beginner Help 7 12-12-2009 11:56 AM
That Green Button - Useful! photog Pentax DSLR Discussion 0 07-03-2009 02:07 AM
Green Button walro Troubleshooting and Beginner Help 1 05-19-2009 03:25 PM



All times are GMT -7. The time now is 01:32 AM. | See also: NikonForums.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