Is Stop-Down Metering...

tabl10s · 10-07-2013, 10:26 PM

really needed with manual lenses? I took pics with my K85 1.8 didn't the use the green button and got great results.

Last edited by tabl10s; 10-08-2013 at 08:28 AM.

Adam · 10-07-2013, 10:29 PM

Originally posted by tabl10s

really needed with manual lenses? I took pics with my K85 1.8 didn't the use of the green button with great results.

Yes it is, if you're actually changing the aperture and not keeping it on F1.8. Otherwise the camera assumes the lens is wide-open.

carrrlangas · 10-07-2013, 11:42 PM

Green button is a good starting point if you don´t know what the settings should be approximately.. Then fire and chimp, adjust and good to go

Jon Petersen · 10-10-2013, 11:32 AM

Originally posted by Adam

Yes it is, if you're actually changing the aperture and not keeping it on F1.8. Otherwise the camera assumes the lens is wide-open.

I don´t understand...

When I put my M 35/2 on f8, and press the green button - the camera stops down and adjust the time so I get a (generally) well-exposed picture.

So, it stops down, meters and sets the time.

But are you saying something else?

Jon

**paulh** · 10-10-2013, 11:37 AM

Originally posted by Jon Petersen

I don´t understand...

When I put my M 35/2 on f8, and press the green button - the camera stops down and adjust the time so I get a (generally) well-exposed picture.

So, it stops down, meters and sets the time.

But are you saying something else?

Jon

You are using the green button correctly. If you don't then the camera will assume the lens is wide-open no matter what aperture you've set. This applies to the K & M (fully manual) lenses.

10-07-2013, 10:26 PM	#1
tabl10s Veteran Member Join Date: Jun 2011 Location: Sacramento(formerly from B'Ham, England). Posts: 1,424	Is Stop-Down Metering... really needed with manual lenses? I took pics with my K85 1.8 didn't the use the green button and got great results. Last edited by tabl10s; 10-08-2013 at 08:28 AM.

10-07-2013, 10:29 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Originally posted by tabl10s really needed with manual lenses? I took pics with my K85 1.8 didn't the use of the green button with great results. Yes it is, if you're actually changing the aperture and not keeping it on F1.8. Otherwise the camera assumes the lens is wide-open. 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:

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10-07-2013, 11:42 PM	#3
carrrlangas Veteran Member Join Date: Mar 2012 Location: Joensuu (Finland) Photos: Gallery Posts: 1,761	Green button is a good starting point if you don´t know what the settings should be approximately.. Then fire and chimp, adjust and good to go

10-10-2013, 11:32 AM	#4
Jon Petersen New Member Join Date: Jun 2013 Photos: Gallery Posts: 22	Originally posted by Adam Yes it is, if you're actually changing the aperture and not keeping it on F1.8. Otherwise the camera assumes the lens is wide-open. I don´t understand... When I put my M 35/2 on f8, and press the green button - the camera stops down and adjust the time so I get a (generally) well-exposed picture. So, it stops down, meters and sets the time. But are you saying something else? Jon

10-10-2013, 11:37 AM	#5
paulh Site Supporter Join Date: Sep 2010 Location: DFW Texas/Ventura County, CA Photos: Gallery \| Albums Posts: 33,258	Originally posted by Jon Petersen I don´t understand... When I put my M 35/2 on f8, and press the green button - the camera stops down and adjust the time so I get a (generally) well-exposed picture. So, it stops down, meters and sets the time. But are you saying something else? Jon You are using the green button correctly. If you don't then the camera will assume the lens is wide-open no matter what aperture you've set. This applies to the K & M (fully manual) lenses.

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