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goshxii · 03-16-2013, 10:25 AM

I need help with the lens I just bought - Pentax-F 50mm 1.7 on my K-01. it stays wide open no matter what mode the camera is in and also there is a sign F-- on the screen. I suspect I'm not switching something though i expected it to work like regular lens...Please help.

kakapo · 03-16-2013, 10:33 AM

When you mount it, does the lens go fully and click into place? My Vivitar 28mm came yesterday, and the first few tries I couldn't turn it fully for some reason. Then I tried turning it very slowly, and it did go until the click.

Adam · 03-16-2013, 10:36 AM

Originally posted by goshxii

I need help with the lens I just bought - Pentax-F 50mm 1.7 on my K-01. it stays wide open no matter what mode the camera is in and also there is a sign F-- on the screen. I suspect I'm not switching something though i expected it to work like regular lens...Please help.

Set the aperture ring to "A"

goshxii · 03-16-2013, 10:42 AM

I can't switch it to A, the ring goes as far as 22 and not any further (next mark is A but it doesn't go that far)

Mike.P® · 03-16-2013, 10:51 AM

are you pushing the little button down as you move the ring to A ?

goshxii · 03-16-2013, 10:58 AM

It worked. Tricky...thanks everyone.

Na Horuk · 03-16-2013, 11:55 AM - **1 Like**

Yep, lenses with an A setting on the aperture ring generally have some sort of button for that setting.
You can also go into the camera menu and set "allow aperture ring", then you can go to M mode (without auto-iso) and you can use the lens manually. It will stop down according to the aperture ring setting and you can use the green button for metering. That is how manual (non-A) lenses work. But yours has an A setting, so use that

03-16-2013, 10:25 AM	#1
goshxii Junior Member Join Date: Feb 2013 Posts: 49	Help needed with Pentax-F 50mm 1.7 I need help with the lens I just bought - Pentax-F 50mm 1.7 on my K-01. it stays wide open no matter what mode the camera is in and also there is a sign F-- on the screen. I suspect I'm not switching something though i expected it to work like regular lens...Please help.

03-16-2013, 10:36 AM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by goshxii I need help with the lens I just bought - Pentax-F 50mm 1.7 on my K-01. it stays wide open no matter what mode the camera is in and also there is a sign F-- on the screen. I suspect I'm not switching something though i expected it to work like regular lens...Please help. Set the aperture ring to "A" 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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03-16-2013, 10:33 AM	#2
kakapo Junior Member Join Date: Mar 2013 Photos: Albums Posts: 41	When you mount it, does the lens go fully and click into place? My Vivitar 28mm came yesterday, and the first few tries I couldn't turn it fully for some reason. Then I tried turning it very slowly, and it did go until the click.

03-16-2013, 10:42 AM	#4
goshxii Junior Member Join Date: Feb 2013 Posts: 49 Original Poster	I can't switch it to A, the ring goes as far as 22 and not any further (next mark is A but it doesn't go that far)

03-16-2013, 10:51 AM	#5
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	are you pushing the little button down as you move the ring to A ?

03-16-2013, 10:58 AM	#6
goshxii Junior Member Join Date: Feb 2013 Posts: 49 Original Poster	It worked. Tricky...thanks everyone.

03-16-2013, 11:55 AM - 1 Like	#7
Na Horuk Veteran Member Join Date: Feb 2012 Location: Slovenia, probably Photos: Gallery \| Albums Posts: 11,186	Yep, lenses with an A setting on the aperture ring generally have some sort of button for that setting. You can also go into the camera menu and set "allow aperture ring", then you can go to M mode (without auto-iso) and you can use the lens manually. It will stop down according to the aperture ring setting and you can use the green button for metering. That is how manual (non-A) lenses work. But yours has an A setting, so use that

Help needed with Pentax-F 50mm 1.7

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