question about contacts

veegish · 12-04-2009, 11:36 AM

would anyone who has a k2000 (or anyone who has more knowledge that I) please tell me if this looks wrong? (circled in red) should it be flat like this, or should it be round like the other contacts? thanks.

zak

Attached Images

**Ash** · 12-04-2009, 11:49 AM

Totally normal with both my cameras.
That contact is flush on my K10D and K20D as well.
Does your camera operate as expected? Are the lenses operating normally?
If so, there's nothing to worry about.

veegish · 12-04-2009, 11:54 AM

Thanks Ash, and no, it is not operating normally. I previously assumed it was a lens issue, but after six weeks at Sigma, the lens checks out. So, the problem lies elsewhere, in camera I assume. Symptoms: lcamera won't properly adjust aperture, like it's always stuck wide open, even though camera says f22. so on any shot above wide open it begins to overexpose, gradually getting worse until almost complete whiteout at smallest aperture. always happens on Sigma 70-300, intermittent with other lenses, but getting worse. i know the next step is to send the camera in, but three weeks without a camera is very hard to contemplate!

**Ash** · 12-04-2009, 12:55 PM

Sounds like a mechanical problem with the camera's aperture lever (sorry I don't know the technical term for this). That indeed should not be happening and it'd be good to get that checked out at the repairers. All the best with that.

jantjooh · 12-04-2009, 01:31 PM

Very useful information about the K-mount can be found here:

veegish · 12-04-2009, 02:22 PM

Here's an example of what I am dealing with, the aperture is not changing, although the camera says it is.

GerryL · 12-04-2009, 04:56 PM

That is totally normal.
I think that is for the "A" pin contact.
I just checked my K100Ds and it has that same config with the contacts.

**Lowell Goudge** · 12-04-2009, 05:26 PM

That pin should be recessed.
As others have commented it is the pin used to detect auto aperture, and is recessed so that it is not shorted when a Non Auto Aperture lens is attached to the camera.

Sounds like the camera is not controlling the aperture of the lenses.

Ole · 12-04-2009, 05:34 PM

You do have the aparture ring on the A setting, right?

If the lens is older and has no A setting you need to set a custom function allowing the camera to use lenses with an aperture ring, and then use M exposure mode with stop down metering (hit the AE-L button to meter).

**Ash** · 12-04-2009, 07:38 PM

Good point Ole.
If you (the OP) are using your A 50 or 70-300 lens on the camera, the aperture ring must be on A for you to control the aperture on the camera.
Depending on what mode you're in the exposure will be unpredictable if the lens is off the 'A' setting. But my thought was that a non-A lens is wide open for each shot that is not stop-down metered on M mode...

opiedog · 12-05-2009, 07:54 AM

i looked at my k2k. the pin is recessed. it's normal

veegish · 12-07-2009, 10:09 AM

Thanks all, the pin is normal.

In answer to the "A" setting, yes, I have the aperture ring on "A". Camera is malfunctioning, it appears. It is intermittent with all the lenses except the sigma 70-300, which is always messed up. time for a repair, though i will wait until after christmastime.

thanks again!

zak

12-04-2009, 11:36 AM	#1
veegish Junior Member Join Date: Sep 2009 Location: Utah Photos: Gallery Posts: 29	question about contacts would anyone who has a k2000 (or anyone who has more knowledge that I) please tell me if this looks wrong? (circled in red) should it be flat like this, or should it be round like the other contacts? thanks. zak Attached Images

12-04-2009, 02:22 PM	#6
veegish Junior Member Join Date: Sep 2009 Location: Utah Photos: Gallery Posts: 29 Original Poster	Here's an example of what I am dealing with, the aperture is not changing, although the camera says it is. Attached Images

12-05-2009, 07:54 AM	#11
opiedog Inactive Account Join Date: Jan 2008 Location: NC Posts: 787	i looked at my k2k. the pin is recessed. it's normal Last edited by opiedog; 12-05-2009 at 09:16 AM.

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12-04-2009, 11:49 AM	#2
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Totally normal with both my cameras. That contact is flush on my K10D and K20D as well. Does your camera operate as expected? Are the lenses operating normally? If so, there's nothing to worry about.

12-04-2009, 11:54 AM	#3
veegish Junior Member Join Date: Sep 2009 Location: Utah Photos: Gallery Posts: 29 Original Poster	Thanks Ash, and no, it is not operating normally. I previously assumed it was a lens issue, but after six weeks at Sigma, the lens checks out. So, the problem lies elsewhere, in camera I assume. Symptoms: lcamera won't properly adjust aperture, like it's always stuck wide open, even though camera says f22. so on any shot above wide open it begins to overexpose, gradually getting worse until almost complete whiteout at smallest aperture. always happens on Sigma 70-300, intermittent with other lenses, but getting worse. i know the next step is to send the camera in, but three weeks without a camera is very hard to contemplate!

12-04-2009, 12:55 PM	#4
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Sounds like a mechanical problem with the camera's aperture lever (sorry I don't know the technical term for this). That indeed should not be happening and it'd be good to get that checked out at the repairers. All the best with that.

12-04-2009, 01:31 PM	#5
jantjooh Junior Member Join Date: Jun 2009 Location: Netherlands Photos: Gallery Posts: 39	Very useful information about the K-mount can be found here:

12-04-2009, 04:56 PM	#7
GerryL Veteran Member Join Date: Jan 2009 Location: CA Posts: 2,731	That is totally normal. I think that is for the "A" pin contact. I just checked my K100Ds and it has that same config with the contacts.

12-04-2009, 05:26 PM	#8
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,886	That pin should be recessed. As others have commented it is the pin used to detect auto aperture, and is recessed so that it is not shorted when a Non Auto Aperture lens is attached to the camera. Sounds like the camera is not controlling the aperture of the lenses.

12-04-2009, 05:34 PM	#9
Ole Administrator Join Date: Sep 2006 Location: Copenhagen, Denmark Photos: Gallery \| Albums Posts: 4,408	You do have the aparture ring on the A setting, right? If the lens is older and has no A setting you need to set a custom function allowing the camera to use lenses with an aperture ring, and then use M exposure mode with stop down metering (hit the AE-L button to meter).

12-04-2009, 07:38 PM	#10
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Good point Ole. If you (the OP) are using your A 50 or 70-300 lens on the camera, the aperture ring must be on A for you to control the aperture on the camera. Depending on what mode you're in the exposure will be unpredictable if the lens is off the 'A' setting. But my thought was that a non-A lens is wide open for each shot that is not stop-down metered on M mode...

12-07-2009, 10:09 AM	#12
veegish Junior Member Join Date: Sep 2009 Location: Utah Photos: Gallery Posts: 29 Original Poster	Thanks all, the pin is normal. In answer to the "A" setting, yes, I have the aperture ring on "A". Camera is malfunctioning, it appears. It is intermittent with all the lenses except the sigma 70-300, which is always messed up. time for a repair, though i will wait until after christmastime. thanks again! zak

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