M lenses stop-down meter with *ist D?

Dubesor · 11-08-2010, 08:12 PM

The Pentax *ist D seems to not be adjusting the metered shutter speed based on aperture changes with M series lenses. It's doing something when the green button is pressed in M mode, but the shutter speed reading stays the same.

Already searched google and this forum, but could only find info on the *ist DL/DS. I would really appreciate some advice from other owners ...

I tried digging in the settings menu to enable stop-down metering. The settings that seemed the most promising were:

Green Button in Manual - the obvious choice was "Tv", which didn't work. Nor did the other two settings: P and Av
F step other than A - made sure that was set to On. Didn't work.

Last edited by Dubesor; 11-08-2010 at 08:40 PM.

Adam · 11-08-2010, 08:19 PM

Here's how it's done: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-manua...7-k-x-etc.html

You've got to be in M mode. Also, you should meter using the DOF preview function rather than the green button, I think.

Dubesor · 11-08-2010, 08:29 PM

Weird, in all my other Pentax DSLRs, that was accomplished either with the green button or the AE-L button.

Anyway, I tried the DOF preview switch. Same problem - no shutter speed changes based on aperture.

Adam · 11-08-2010, 08:31 PM

Both should work, but I was under the impression that with the ist D, only the stop down lever would get the job done. And you're in M mode? Nothing even when you change the aperture dramatically?

Adam
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Dubesor · 11-08-2010, 08:35 PM

Originally posted by Adam

Both should work, but I was under the impression that with the ist D, only the stop down lever would get the job done. And you're in M mode? Nothing even when you change the aperture dramatically?

Definitely in M mode. No changes with either green button or DOF lever - even when changing from f1.7 to f22.

Also tried a couple different M lenses to confirm it wasn't a lens issue ...

Adam · 11-08-2010, 08:40 PM

Not sure then. Maybe you've reprogrammed both buttons in the menu (although I was under the impression that this wasn't possible, at least for the DOF preview lever).

Dubesor · 11-09-2010, 07:25 PM

Originally posted by Adam

Not sure then. Maybe you've reprogrammed both buttons in the menu (although I was under the impression that this wasn't possible, at least for the DOF preview lever).

No, I don't think it's that. I'm really at a loss here. Any others care to weigh in?

MrEspie · 11-09-2010, 07:52 PM

Can you confirm that the diaphragm is actuating when you are pressing the green button? You can either check by looking through the front of the lens while it's metering, or through the viewfinder if you're stopping down significantly.

Does the camera still meter correctly with AE-enabled lenses?

Dubesor · 11-09-2010, 11:01 PM

Originally posted by MrEspie

Can you confirm that the diaphragm is actuating when you are pressing the green button? You can either check by looking through the front of the lens while it's metering, or through the viewfinder if you're stopping down significantly.

Does the camera still meter correctly with AE-enabled lenses?

1) Actually, the diaphragm is not moving. It makes a sound, but no movement of the blades, stays wide open. I wonder why this would be?

2) The camera does meter fine with my FA series lenses, controlling aperture through the body with FA lenses also OK. M42 lenses in A mode also meter and stop down correctly. As I mentioned, I've also confirmed that my M lenses work fine on other digital bodies.

I still feel like maybe I've missed something in the menus ...

**Lowell Goudge** · 11-10-2010, 03:26 AM

check your firmware version

the origonal *istD firmware did not support metering with K mount lenses.

This was brought out in the first revision I believe, in January 2004.

Otherwise, the *istD meters very well with Manual aperture lenses but only in M mode.'

In all other modes it will shoot wide open

Dubesor · 11-10-2010, 03:51 AM

Originally posted by Lowell Goudge

check your firmware version

the origonal *istD firmware did not support metering with K mount lenses.

This was brought out in the first revision I believe, in January 2004.

Otherwise, the *istD meters very well with Manual aperture lenses but only in M mode.'

In all other modes it will shoot wide open

awesome! i can't believe i didn't think of that sooner. the simplest solution is almost always the right one

will try that in that morning.

Dubesor · 11-11-2010, 12:21 PM

Actually, it was already the latest version - 1.12. I updated to 1.12 again anyway in case the camera's firmware was corrupt or something.

Update was successful, but the diaphragm is still not moving and the camera won't stop down meter with M lenses in M mode

Anyone?

Adam · 11-11-2010, 01:26 PM

Do they at least stop down when you do DOF preview?

Dubesor · 11-11-2010, 01:30 PM

Originally posted by Adam

Do they at least stop down when you do DOF preview?

Nope. No stopping down or meter reading change with either DOF lever or green button.

FA/FAJ series and M42 lenses tested on this camera stop down fine. Just have this issue when I need to stop down to meter with M series.

Adam · 11-11-2010, 01:50 PM

And you do have the "enable aperture ring" option enabled, right?

11-08-2010, 08:12 PM	#1
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336	*M lenses stop-down meter with ist D?** The Pentax ist D seems to not be adjusting the metered shutter speed based on aperture changes with M series lenses. It's doing something when the green button is pressed in M mode, but the shutter speed reading stays the same. Already searched google and this forum, but could only find info on the ist DL/DS. I would really appreciate some advice from other owners ... I tried digging in the settings menu to enable stop-down metering. The settings that seemed the most promising were: Green Button in Manual - the obvious choice was "Tv", which didn't work. Nor did the other two settings: P and Av F step other than A - made sure that was set to On. Didn't work. Last edited by Dubesor; 11-08-2010 at 08:40 PM.

11-08-2010, 08:19 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Here's how it's done: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-manua...7-k-x-etc.html You've got to be in M mode. Also, you should meter using the DOF preview function rather than the green button, I think. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-08-2010, 08:40 PM	#6
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Not sure then. Maybe you've reprogrammed both buttons in the menu (although I was under the impression that this wasn't possible, at least for the DOF preview lever). Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-11-2010, 01:26 PM	#13
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Do they at least stop down when you do DOF preview? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-11-2010, 01:50 PM	#15
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	And you do have the "enable aperture ring" option enabled, right? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-08-2010, 08:29 PM	#3
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Weird, in all my other Pentax DSLRs, that was accomplished either with the green button or the AE-L button. Anyway, I tried the DOF preview switch. Same problem - no shutter speed changes based on aperture.

11-08-2010, 08:31 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Both should work, but I was under the impression that with the ist D, only the stop down lever would get the job done. And you're in M mode? Nothing even when you change the aperture dramatically? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-08-2010, 08:35 PM	#5
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Originally posted by Adam Both should work, but I was under the impression that with the ist D, only the stop down lever would get the job done. And you're in M mode? Nothing even when you change the aperture dramatically? Definitely in M mode. No changes with either green button or DOF lever - even when changing from f1.7 to f22. Also tried a couple different M lenses to confirm it wasn't a lens issue ...

11-09-2010, 07:25 PM	#7
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Originally posted by Adam Not sure then. Maybe you've reprogrammed both buttons in the menu (although I was under the impression that this wasn't possible, at least for the DOF preview lever). No, I don't think it's that. I'm really at a loss here. Any others care to weigh in?

11-09-2010, 07:52 PM	#8
MrEspie Senior Member Join Date: Jan 2009 Location: University of Waterloo, ON Photos: Gallery Posts: 239	Can you confirm that the diaphragm is actuating when you are pressing the green button? You can either check by looking through the front of the lens while it's metering, or through the viewfinder if you're stopping down significantly. Does the camera still meter correctly with AE-enabled lenses?

11-09-2010, 11:01 PM	#9
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Originally posted by MrEspie Can you confirm that the diaphragm is actuating when you are pressing the green button? You can either check by looking through the front of the lens while it's metering, or through the viewfinder if you're stopping down significantly. Does the camera still meter correctly with AE-enabled lenses? 1) Actually, the diaphragm is not moving. It makes a sound, but no movement of the blades, stays wide open. I wonder why this would be? 2) The camera does meter fine with my FA series lenses, controlling aperture through the body with FA lenses also OK. M42 lenses in A mode also meter and stop down correctly. As I mentioned, I've also confirmed that my M lenses work fine on other digital bodies. I still feel like maybe I've missed something in the menus ...

11-10-2010, 03:26 AM	#10
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	check your firmware version the origonal istD firmware did not support metering with K mount lenses. This was brought out in the first revision I believe, in January 2004. Otherwise, the istD meters very well with Manual aperture lenses but only in M mode.' In all other modes it will shoot wide open

11-10-2010, 03:51 AM	#11
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Originally posted by Lowell Goudge check your firmware version the origonal istD firmware did not support metering with K mount lenses. This was brought out in the first revision I believe, in January 2004. Otherwise, the istD meters very well with Manual aperture lenses but only in M mode.' In all other modes it will shoot wide open awesome! i can't believe i didn't think of that sooner. the simplest solution is almost always the right one will try that in that morning.

11-11-2010, 12:21 PM	#12
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Actually, it was already the latest version - 1.12. I updated to 1.12 again anyway in case the camera's firmware was corrupt or something. Update was successful, but the diaphragm is still not moving and the camera won't stop down meter with M lenses in M mode Anyone?

11-11-2010, 01:30 PM	#14
Dubesor Veteran Member Join Date: Dec 2007 Location: Vancouver, British Columbia Posts: 336 Original Poster	Originally posted by Adam Do they at least stop down when you do DOF preview? Nope. No stopping down or meter reading change with either DOF lever or green button. FA/FAJ series and M42 lenses tested on this camera stop down fine. Just have this issue when I need to stop down to meter with M series.

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