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deadwolfbones · 11-20-2009, 01:24 PM

And it doesn't do this with AF lenses?

Eruditass · 11-20-2009, 01:27 PM

Does anyone know if aperture blades are sticky if the camera will wait till it stops down completely or just take a picture in the middle of them closing down?

Change the green button to DoF optical preview and see if using this is also slow. Then take the lens off the camera and see if the blades stop down from f/2 to f/22 quickly and instantly.

SteveM · 11-20-2009, 01:45 PM

This does seem odd. Once you have the lens off the camera, and you set the lens to F22, you should be able to open the blades with your finger using the tab that sticks out a bit on the back of the lens. It should be almost effort free. If it is not, then that could be causing your grief.

When the lens is back on the camera, and you are in A mode and set the F stop to 22 (using the camera or you can just set it manually to F22), and you look directly into the lens while you try to take a picture, you should see the blades quickly close when the mirror goes up. They should open again when the mirror goes down.

Or it could be that there is something wrong with the camera....

You could take your lens into a camera shop and try it on another K-x??

pjr · 11-20-2009, 02:03 PM

thanks for taking time to troubleshoot this weird problem.

smc, Eruditass,

I tried the tab on lens to check aperture blades.. I only feel the spring resistance. The blades close and open fine. I don't see anything getting stuck.

Also when I press shutter button with no lens.. I see a small tab on the hand grip side of the camera going up and down. I believe it controls the aperture blades.

But when I look thru the lens when taking picture.. I don't think I see the aperture blades closing. They are wide open. I only see mirror moving up..waiting for few sec and goes down. No picture taken.

deadwolfbones,

Its working good with kit lenses. 18-55, 55-300.

SteveM · 11-20-2009, 02:09 PM

Originally posted by pjr

thanks for taking time to troubleshoot this weird problem.

smc, Eruditass,

I tried the tab on lens to check aperture blades.. I only feel the spring resistance. The blades close and open fine. I don't see anything getting stuck.

Also when I press shutter button with no lens.. I see a small tab on the hand grip side of the camera going up and down. I believe it controls the aperture blades.

But when I look thru the lens when taking picture.. I don't think I see the aperture blades closing. They are wide open. I only see mirror moving up..waiting for few sec and goes down. No picture taken.

If it's set to F22 you should be able to see them close. If you push and hold the green button do they close?(they should) Is there someone near you that has a manual lens you can try (so we can narrow down if it is the lens or camera)?

Eruditass · 11-20-2009, 02:13 PM

Try the optical preview green button settings and hold it down, the iris should stay closed down until you let go.

pjr · 11-20-2009, 02:30 PM

I believe I might have found the issue. Please cehck these photos...

http://picasaweb.google.com/pjrphotos/Lensproblem?authkey=Gv1sRgCMnG6ayRueqH...00182975563842

It seems like the aperture tab on the 50mm lens is bent and the lever that lifts it is missing the tab.

Please confirm if this can be issue... I am planning to bend this tab..

no sure if it breaks or not. Any insight will be appreciated.

SteveM · 11-20-2009, 02:34 PM

Yes..it looks bent. Not sure if it will break....but I wouldn't think so if you are careful.....and don't overdo it...

pjr · 11-20-2009, 02:40 PM

Well.. great news.. it worked.

bunch of thanks for your time, advice and support.

. Now I feel like I know a lot about lenses

I was so worried that I had a problem with K-x. now it works smooth.

SteveM · 11-20-2009, 04:29 PM

Looking forward to seeing you post some pics!

rawr · 11-20-2009, 06:12 PM

Good to hear it worked out. Hope you take some great photos with that lens.

Those older Pentax 50mm lenses are great. I was just using my SMC M 50mm 1.7 on my K-x, and am always amazed at how sharp it is, even completely wide open. I must use that lens more.

**Lowell Goudge** · 11-20-2009, 06:17 PM

Originally posted by pjr

Well.. great news.. it worked.

bunch of thanks for your time, advice and support.

. Now I feel like I know a lot about lenses

I was so worried that I had a problem with K-x. now it works smooth.

curious, this must have jammed the mechanism in the body. Can't be all that good for the body if you do this too often.

SteveM · 11-20-2009, 06:33 PM

Originally posted by Lowell Goudge

curious, this must have jammed the mechanism in the body. Can't be all that good for the body if you do this too often.

I'm guessing it missed the tab on the len and the Kx then got confused with the metering on the shot.....

pjr · 11-21-2009, 12:29 AM

smc

you are right.. the lever was missing the tab and the camera doesn't know what to do. So it waits and waits then give up.

Anyway.. I am good now. I got this pentax 50mm f2 and a takumar 50mm 1.4. Played around with those lenses and got these.

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11-20-2009, 01:24 PM	#16
deadwolfbones Veteran Member Join Date: Sep 2007 Location: Santa Fe, NM Posts: 7,451	And it doesn't do this with AF lenses?

11-20-2009, 01:27 PM	#17
Eruditass Veteran Member Join Date: Jul 2009 Photos: Gallery Posts: 2,207	Does anyone know if aperture blades are sticky if the camera will wait till it stops down completely or just take a picture in the middle of them closing down? Change the green button to DoF optical preview and see if using this is also slow. Then take the lens off the camera and see if the blades stop down from f/2 to f/22 quickly and instantly.

11-20-2009, 01:45 PM	#18
SteveM Veteran Member Join Date: Jan 2009 Location: Vancouver Island, BC, Canada Photos: Gallery Posts: 3,294	This does seem odd. Once you have the lens off the camera, and you set the lens to F22, you should be able to open the blades with your finger using the tab that sticks out a bit on the back of the lens. It should be almost effort free. If it is not, then that could be causing your grief. When the lens is back on the camera, and you are in A mode and set the F stop to 22 (using the camera or you can just set it manually to F22), and you look directly into the lens while you try to take a picture, you should see the blades quickly close when the mirror goes up. They should open again when the mirror goes down. Or it could be that there is something wrong with the camera.... You could take your lens into a camera shop and try it on another K-x??

11-20-2009, 02:03 PM	#19
pjr Junior Member Join Date: Oct 2009 Location: dallas Posts: 46 Original Poster	thanks for taking time to troubleshoot this weird problem. smc, Eruditass, I tried the tab on lens to check aperture blades.. I only feel the spring resistance. The blades close and open fine. I don't see anything getting stuck. Also when I press shutter button with no lens.. I see a small tab on the hand grip side of the camera going up and down. I believe it controls the aperture blades. But when I look thru the lens when taking picture.. I don't think I see the aperture blades closing. They are wide open. I only see mirror moving up..waiting for few sec and goes down. No picture taken. deadwolfbones, Its working good with kit lenses. 18-55, 55-300.

11-20-2009, 02:09 PM	#20
SteveM Veteran Member Join Date: Jan 2009 Location: Vancouver Island, BC, Canada Photos: Gallery Posts: 3,294	Originally posted by pjr thanks for taking time to troubleshoot this weird problem. smc, Eruditass, I tried the tab on lens to check aperture blades.. I only feel the spring resistance. The blades close and open fine. I don't see anything getting stuck. Also when I press shutter button with no lens.. I see a small tab on the hand grip side of the camera going up and down. I believe it controls the aperture blades. But when I look thru the lens when taking picture.. I don't think I see the aperture blades closing. They are wide open. I only see mirror moving up..waiting for few sec and goes down. No picture taken. If it's set to F22 you should be able to see them close. If you push and hold the green button do they close?(they should) Is there someone near you that has a manual lens you can try (so we can narrow down if it is the lens or camera)?

11-20-2009, 02:13 PM	#21
Eruditass Veteran Member Join Date: Jul 2009 Photos: Gallery Posts: 2,207	Try the optical preview green button settings and hold it down, the iris should stay closed down until you let go.

11-20-2009, 02:30 PM	#22
pjr Junior Member Join Date: Oct 2009 Location: dallas Posts: 46 Original Poster	I believe I might have found the issue. Please cehck these photos... http://picasaweb.google.com/pjrphotos/Lensproblem?authkey=Gv1sRgCMnG6ayRueqH...00182975563842 It seems like the aperture tab on the 50mm lens is bent and the lever that lifts it is missing the tab. Please confirm if this can be issue... I am planning to bend this tab.. no sure if it breaks or not. Any insight will be appreciated.

11-20-2009, 02:34 PM	#23
SteveM Veteran Member Join Date: Jan 2009 Location: Vancouver Island, BC, Canada Photos: Gallery Posts: 3,294	Yes..it looks bent. Not sure if it will break....but I wouldn't think so if you are careful.....and don't overdo it...

11-20-2009, 02:40 PM	#24
pjr Junior Member Join Date: Oct 2009 Location: dallas Posts: 46 Original Poster	Well.. great news.. it worked. bunch of thanks for your time, advice and support. . Now I feel like I know a lot about lenses I was so worried that I had a problem with K-x. now it works smooth.

11-20-2009, 04:29 PM	#25
SteveM Veteran Member Join Date: Jan 2009 Location: Vancouver Island, BC, Canada Photos: Gallery Posts: 3,294	Looking forward to seeing you post some pics!

11-20-2009, 06:12 PM	#26
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Good to hear it worked out. Hope you take some great photos with that lens. Those older Pentax 50mm lenses are great. I was just using my SMC M 50mm 1.7 on my K-x, and am always amazed at how sharp it is, even completely wide open. I must use that lens more.

11-20-2009, 06:17 PM	#27
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,892	Originally posted by pjr Well.. great news.. it worked. bunch of thanks for your time, advice and support. . Now I feel like I know a lot about lenses I was so worried that I had a problem with K-x. now it works smooth. curious, this must have jammed the mechanism in the body. Can't be all that good for the body if you do this too often.

11-20-2009, 06:33 PM	#28
SteveM Veteran Member Join Date: Jan 2009 Location: Vancouver Island, BC, Canada Photos: Gallery Posts: 3,294	Originally posted by Lowell Goudge curious, this must have jammed the mechanism in the body. Can't be all that good for the body if you do this too often. I'm guessing it missed the tab on the len and the Kx then got confused with the metering on the shot.....

11-21-2009, 12:29 AM	#29
pjr Junior Member Join Date: Oct 2009 Location: dallas Posts: 46 Original Poster	smc you are right.. the lever was missing the tab and the camera doesn't know what to do. So it waits and waits then give up. Anyway.. I am good now. I got this pentax 50mm f2 and a takumar 50mm 1.4. Played around with those lenses and got these.

How to use old pentax lenses on K-x?

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