Green button wasn't working on k50

**Another dyemention** · 03-01-2015, 03:07 PM

So I was out yesterday with my new k35/3.5 and the green button was not responding. I either had to turn off the power or switch to a different mode on the top dial thenswitch back to manual and it would work. Also while it wasn't working, the front dial would not work either (shutter speed) until I switched modes and back to manual. Anyone else have this problem? I've been using a k135 for a while now and never had that issue so not sure what was going on.
Thanks

---------- Post added 03-01-15 at 03:12 PM ----------

And it seems to be working fine right now. Not sure if it was from the cold but it was only in the low 20s. I've been out in colder temps with no issues back in January. So not sure.

Na Horuk · 03-01-2015, 04:12 PM

Is it possible it was some other problem? Like the lens not being totally mounted (it needs to click into place), camera in Av mode, auto ISO, Green button customized to some other function?

**Another dyemention** · 03-01-2015, 04:57 PM

Definitely wasn't in the wrong mode or the button being set wrong. It's possible the lens wasn't on all the way as that lens is much tighter than any other lens I've ever used. But it did work correctly a few times. And it did work after changing modes. I'll have to take it out again soon and see if I can duplicate the results. I live east of cleveland so the weather should be complete crap for a few more weeks at least.

Trigger Happy · 03-01-2015, 10:51 PM

If the contacts on the body don't make good contact to short out on the lens mount then the K-30 for sure (and I assume the K-50 as well, since they're very similar) will not meter with the green button in M mode unless you're in live view. You can test this with an M42 lens that doesn't short out the body contacts, or with no lens, to see if it's the same behaviour.

Not sure about the front wheel not working.

stevebrot · 03-02-2015, 03:10 PM

Originally posted by Trigger Happy

If the contacts on the body don't make good contact to short out on the lens mount then the K-30 for sure (and I assume the K-50 as well, since they're very similar) will not meter with the green button in M mode unless you're in live view. You can test this with an M42 lens that doesn't short out the body contacts, or with no lens, to see if it's the same behaviour.

Not sure about the front wheel not working.

What he said.

Clean the face of the mount on the lens with alcohol and see if that does not help things a little.

Steve

03-01-2015, 03:07 PM	#1
Another dyemention Site Supporter Join Date: Apr 2014 Posts: 432	Green button wasn't working on k50 So I was out yesterday with my new k35/3.5 and the green button was not responding. I either had to turn off the power or switch to a different mode on the top dial thenswitch back to manual and it would work. Also while it wasn't working, the front dial would not work either (shutter speed) until I switched modes and back to manual. Anyone else have this problem? I've been using a k135 for a while now and never had that issue so not sure what was going on. Thanks ---------- Post added 03-01-15 at 03:12 PM ---------- And it seems to be working fine right now. Not sure if it was from the cold but it was only in the low 20s. I've been out in colder temps with no issues back in January. So not sure.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
K50, M42 lens and Green Button	SpeedGeezerButler	Pentax K-30 & K-50	21	12-17-2014 03:57 PM
K-50 green Button in Manual Mode not working	PaulAsahi	Pentax K-30 & K-50	8	09-01-2014 04:09 AM
Green button not Working in Manual Mode with m42	rp_dxn	Pentax K-30 & K-50	47	03-01-2014 02:50 AM
K50 Screwmount Metering Issues: Green Button Meters in LV but not in VF	Relativity	Pentax K-30 & K-50	5	01-31-2014 10:17 AM
TAV - green button P line NOT WORKING	deadprez	Pentax K-5 & K-5 II	3	05-30-2011 06:29 AM

03-01-2015, 04:12 PM	#2
Na Horuk Veteran Member Join Date: Feb 2012 Location: Slovenia, probably Photos: Gallery \| Albums Posts: 11,186	Is it possible it was some other problem? Like the lens not being totally mounted (it needs to click into place), camera in Av mode, auto ISO, Green button customized to some other function?

03-01-2015, 04:57 PM	#3
Another dyemention Site Supporter Join Date: Apr 2014 Posts: 432 Original Poster	Definitely wasn't in the wrong mode or the button being set wrong. It's possible the lens wasn't on all the way as that lens is much tighter than any other lens I've ever used. But it did work correctly a few times. And it did work after changing modes. I'll have to take it out again soon and see if I can duplicate the results. I live east of cleveland so the weather should be complete crap for a few more weeks at least.

03-01-2015, 10:51 PM	#4
Trigger Happy Forum Member Join Date: Jun 2013 Location: Prince George, BC Photos: Albums Posts: 80	If the contacts on the body don't make good contact to short out on the lens mount then the K-30 for sure (and I assume the K-50 as well, since they're very similar) will not meter with the green button in M mode unless you're in live view. You can test this with an M42 lens that doesn't short out the body contacts, or with no lens, to see if it's the same behaviour. Not sure about the front wheel not working.

03-02-2015, 03:10 PM	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Trigger Happy If the contacts on the body don't make good contact to short out on the lens mount then the K-30 for sure (and I assume the K-50 as well, since they're very similar) will not meter with the green button in M mode unless you're in live view. You can test this with an M42 lens that doesn't short out the body contacts, or with no lens, to see if it's the same behaviour. Not sure about the front wheel not working. What he said. Clean the face of the mount on the lens with alcohol and see if that does not help things a little. Steve