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pswart · 03-08-2010, 04:52 PM

I have some old lenses from K1000 days. When I put them on my kx the F number on the screen flashes. Reading the manual does not seem to help. I read that all K mount lenses work so what am I doing wrong?

Peter

Transit · 03-08-2010, 05:03 PM

There is a 'a use aperture ring' setting you need to enable.
Camera has electric contacts to read lens aperture.
Aperture contacts started with the 'A' lenses.
K and M lens haven't got them.

K and M will shoot normally in Av but will always leave lens open wide

In Manual, you need to hit the green button so the camera stops down to what ever you have the lens set at and takes a reading, and sets shutter speed accordingly.
Camera stops down lens as normal during shooting.

have fun
pete

smokeydan · 03-08-2010, 05:06 PM

Hi Peter,

first you have to set "using aperture ring" to "permitted" if its a K or an M rather than an A lens (menu/C/4)

I believe the focus mode will be set automatically to manual, but I've been flipping the switch to manual just to be safe. you will still get a beep to confirm focus.

If the lens is an "A" you can use it in aperture priority (Av) mode and control the aperture from the thumb wheel if you have the lens set to "A"

If the lens is an "M" or a "K" with no "A" setting, you must use the camera in Manual (M) mode- which will in effect be like aperture priority on an old 35mm film camera- set the aperture using the ring on the lens, and then press the +/- button, which will stop down the aperture and take a meter reading, automatically setting the shutter speed to the desired setting- you can now take a shot. At least, that's how I think its working on mine!!!

cheers

Dan

pswart · 03-08-2010, 05:16 PM

Thanks Works great

Transit · 03-08-2010, 05:28 PM

Originally posted by smokeydan

If the lens is an "M" or a "K" with no "A" setting, you must use the camera in Manual (M) mode-

please read my Av comment above

There is no 'must' about it, just wide open !
Pete

Ira · 03-08-2010, 06:21 PM

What Transit said!!!

But Pete, you first have to assign the Green Button to TV shift, correct?

Transit · 03-08-2010, 08:58 PM

not sure about setting green button
maybe it uses AE/L button like K100D
sry I haven't got the K-x in front of me since my daughter took it

menifeeminister · 03-08-2010, 09:01 PM

Follow these instructions:
http://support.pentaximaging.com/documents/908

Ira · 03-09-2010, 04:03 AM

Originally posted by menifeeminister

Follow these instructions:
http://support.pentaximaging.com/documents/908

Yep--that's exactly how I did it.

phzy2003 · 04-07-2010, 10:44 PM

it is ok. you just have to change aperture your self on the lens body

kunaalbhasin · 04-08-2010, 01:35 AM

Camera has electric contacts to read lens aperture.
Aperture contacts started with the 'A' lenses.
K and M lens haven't got them.

pathfinder · 04-08-2010, 05:20 PM

yup, with the k and m lens you are better off shooting Manual and for best exposure, if you have it, use a hand held meter to check the light.

**cheekygeek** · 05-24-2010, 09:29 PM

Ira and Transit don't yet know how to use their cameras, so I'm not sure why they are posting their inaccurate advice as "answers". As someone else linked above, everything you need to know is here: http://support.pentaximaging.com/documents/908

Adam · 05-24-2010, 09:40 PM

The first reply seemed to nail it IMO...

**cheekygeek** · 05-24-2010, 09:54 PM

The first reply is fine, as far as it goes. However, it doesn't mention the menu settings required for the Green Button functionality on the K-x (which has gotten a lot more complicated since my K200D). It also gives the impression that you can't use K or M lenses in anything other than wide open.

03-08-2010, 04:52 PM	#1
pswart New Member Join Date: Mar 2010 Location: Miami Posts: 3	Old Lenses on KX I have some old lenses from K1000 days. When I put them on my kx the F number on the screen flashes. Reading the manual does not seem to help. I read that all K mount lenses work so what am I doing wrong? Peter

03-08-2010, 05:03 PM	#2
Transit Pentaxian Join Date: Aug 2007 Location: Whanganui NZ Photos: Gallery \| Albums Posts: 4,624	There is a 'a use aperture ring' setting you need to enable. Camera has electric contacts to read lens aperture. Aperture contacts started with the 'A' lenses. K and M lens haven't got them. K and M will shoot normally in Av but will always leave lens open wide In Manual, you need to hit the green button so the camera stops down to what ever you have the lens set at and takes a reading, and sets shutter speed accordingly. Camera stops down lens as normal during shooting. have fun pete Last edited by Transit; 03-08-2010 at 05:10 PM.

03-08-2010, 09:01 PM	#8
menifeeminister New Member Join Date: Feb 2010 Location: Southern California Posts: 11	follow these instructions re: green button Follow these instructions: http://support.pentaximaging.com/documents/908

05-24-2010, 09:40 PM	#14
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	The first reply seemed to nail it IMO... 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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03-08-2010, 05:06 PM	#3
smokeydan New Member Join Date: Feb 2010 Location: manchester Posts: 13	Hi Peter, first you have to set "using aperture ring" to "permitted" if its a K or an M rather than an A lens (menu/C/4) I believe the focus mode will be set automatically to manual, but I've been flipping the switch to manual just to be safe. you will still get a beep to confirm focus. If the lens is an "A" you can use it in aperture priority (Av) mode and control the aperture from the thumb wheel if you have the lens set to "A" If the lens is an "M" or a "K" with no "A" setting, you must use the camera in Manual (M) mode- which will in effect be like aperture priority on an old 35mm film camera- set the aperture using the ring on the lens, and then press the +/- button, which will stop down the aperture and take a meter reading, automatically setting the shutter speed to the desired setting- you can now take a shot. At least, that's how I think its working on mine!!! cheers Dan

03-08-2010, 05:16 PM	#4
pswart New Member Join Date: Mar 2010 Location: Miami Posts: 3 Original Poster	Thanks Works great

03-08-2010, 05:28 PM	#5
Transit Pentaxian Join Date: Aug 2007 Location: Whanganui NZ Photos: Gallery \| Albums Posts: 4,624	Originally posted by smokeydan If the lens is an "M" or a "K" with no "A" setting, you must use the camera in Manual (M) mode- please read my Av comment above There is no 'must' about it, just wide open ! Pete

03-08-2010, 06:21 PM	#6
Ira Inactive Account Join Date: Mar 2009 Location: Coral Springs, FL Photos: Gallery \| Albums Posts: 5,216	What Transit said!!! But Pete, you first have to assign the Green Button to TV shift, correct?

03-08-2010, 08:58 PM	#7
Transit Pentaxian Join Date: Aug 2007 Location: Whanganui NZ Photos: Gallery \| Albums Posts: 4,624	not sure about setting green button maybe it uses AE/L button like K100D sry I haven't got the K-x in front of me since my daughter took it

03-09-2010, 04:03 AM	#9
Ira Inactive Account Join Date: Mar 2009 Location: Coral Springs, FL Photos: Gallery \| Albums Posts: 5,216	Originally posted by menifeeminister Follow these instructions: http://support.pentaximaging.com/documents/908 Yep--that's exactly how I did it.

04-07-2010, 10:44 PM	#10
phzy2003 Senior Member Join Date: Mar 2010 Location: Gold Coast, Australia Photos: Gallery Posts: 167	it is ok. you just have to change aperture your self on the lens body

04-08-2010, 01:35 AM	#11
kunaalbhasin Forum Member Join Date: Jan 2010 Posts: 53	Camera has electric contacts to read lens aperture. Aperture contacts started with the 'A' lenses. K and M lens haven't got them.

04-08-2010, 05:20 PM	#12
pathfinder New Member Join Date: Sep 2007 Location: norht carolina Posts: 7	yup, with the k and m lens you are better off shooting Manual and for best exposure, if you have it, use a hand held meter to check the light.

05-24-2010, 09:29 PM	#13
cheekygeek Site Supporter Join Date: Jul 2008 Location: Kearney, Nebraska USA Photos: Gallery \| Albums Posts: 1,261	Ira and Transit don't yet know how to use their cameras, so I'm not sure why they are posting their inaccurate advice as "answers". As someone else linked above, everything you need to know is here: http://support.pentaximaging.com/documents/908

05-24-2010, 09:54 PM	#15
cheekygeek Site Supporter Join Date: Jul 2008 Location: Kearney, Nebraska USA Photos: Gallery \| Albums Posts: 1,261	The first reply is fine, as far as it goes. However, it doesn't mention the menu settings required for the Green Button functionality on the K-x (which has gotten a lot more complicated since my K200D). It also gives the impression that you can't use K or M lenses in anything other than wide open.

Old Lenses on KX

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