FA* lens won't autofocus - please help me solve this

Matt Miller · 10-06-2008, 11:30 AM

I have a K20D. I currently own just one autofocus lens, the 16-45 f4. It focuses just fine on the camera.

Today, I received a used FA* 85/1.4 that I purchased on ebay. It won't autofocus. I can't figure out why not. I've cleaned the contacts with an eraser. The aperture and metering is working fine. It manual focuses smoothly and easily. When I try to autofocus, I hear nothing. Neither the camera nor the lens make a sound.

What's the deal?

wlachan · 10-06-2008, 11:37 AM

You need to switch the focus ring to AF position, or you can just ship it to me (I prefer the latter).

Matt Miller · 10-06-2008, 11:43 AM

That worked perfectly, thank you!

I feel like an idiot. Please delete this thread.

ibbe · 10-06-2008, 11:56 AM

oh no, first we must lynch mob you, and after that we close the thread

**Canada_Rockies** · 10-06-2008, 03:42 PM

Originally posted by ibbe

oh no, first we must lynch mob you, and after that we close the thread

You left out the hot tar and feathers and the rail to get him out of town first.

KungPOW · 10-06-2008, 05:06 PM

Originally posted by Matt Miller

That worked perfectly, thank you!

I feel like an idiot. Please delete this thread.

In the first week with my DSLR, I was out taking photos of flowers....

And they all came out blue! Everything was tinted blue!

I was sure my new camera was hooped. I was all set to pack it up and take it back, when I recalled playing with that "white balence" thing...

Anyhow, glad you got your lens to work.

sharko · 10-06-2008, 05:48 PM

It happens to all of us...when I first got my Tamron 90mm Macro lens I was kinda ticked and thought it was broken because the focusing ring would just keep turning and turning and not do any focusing and I just all of a sudden jerked it in desperation to try and get it to do something and I heard it snap into the manual focus position and all was well after that

creampuff · 10-06-2008, 08:04 PM

Don't you people even read the Camera's Operating Manual?

jsherman999 · 10-06-2008, 08:19 PM

Once after shooting with a Tak most of the day, I put my 50-135 on and spent the next 30 seconds wondering why the AF was 'broken'.

MF->AF switch. Duh. Could happen to anyone.

10-06-2008, 11:30 AM	#1
Matt Miller Veteran Member Join Date: May 2007 Location: Cambridge, Iowa Photos: Gallery Posts: 339	*FA lens won't autofocus - please help me solve this** I have a K20D. I currently own just one autofocus lens, the 16-45 f4. It focuses just fine on the camera. Today, I received a used FA* 85/1.4 that I purchased on ebay. It won't autofocus. I can't figure out why not. I've cleaned the contacts with an eraser. The aperture and metering is working fine. It manual focuses smoothly and easily. When I try to autofocus, I hear nothing. Neither the camera nor the lens make a sound. What's the deal?

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10-06-2008, 11:37 AM	#2
wlachan Veteran Member Join Date: Sep 2006 Location: Canada Photos: Albums Posts: 2,625	You need to switch the focus ring to AF position, or you can just ship it to me (I prefer the latter).

10-06-2008, 11:43 AM	#3
Matt Miller Veteran Member Join Date: May 2007 Location: Cambridge, Iowa Photos: Gallery Posts: 339 Original Poster	That worked perfectly, thank you! I feel like an idiot. Please delete this thread.

10-06-2008, 11:56 AM	#4
ibbe Inactive Account Join Date: May 2008 Posts: 34	oh no, first we must lynch mob you, and after that we close the thread

10-06-2008, 03:42 PM	#5
Canada_Rockies Loyal Site Supporter Join Date: Nov 2007 Location: Sparwood, BC, Canada Photos: Gallery \| Albums Posts: 12,385	Originally posted by ibbe oh no, first we must lynch mob you, and after that we close the thread You left out the hot tar and feathers and the rail to get him out of town first.

10-06-2008, 05:06 PM	#6
KungPOW Veteran Member Join Date: Nov 2007 Location: Vancouver, Canada Photos: Gallery Posts: 1,699	Originally posted by Matt Miller That worked perfectly, thank you! I feel like an idiot. Please delete this thread. In the first week with my DSLR, I was out taking photos of flowers.... And they all came out blue! Everything was tinted blue! I was sure my new camera was hooped. I was all set to pack it up and take it back, when I recalled playing with that "white balence" thing... Anyhow, glad you got your lens to work.

10-06-2008, 05:48 PM	#7
sharko Senior Member Join Date: May 2008 Location: City of Angels Photos: Gallery Posts: 278	It happens to all of us...when I first got my Tamron 90mm Macro lens I was kinda ticked and thought it was broken because the focusing ring would just keep turning and turning and not do any focusing and I just all of a sudden jerked it in desperation to try and get it to do something and I heard it snap into the manual focus position and all was well after that

10-06-2008, 08:04 PM	#8
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	Don't you people even read the Camera's Operating Manual?

10-06-2008, 08:19 PM	#9
jsherman999 Veteran Member Join Date: Dec 2007 Photos: Gallery Posts: 8,237	Once after shooting with a Tak most of the day, I put my 50-135 on and spent the next 30 seconds wondering why the AF was 'broken'. MF->AF switch. Duh. Could happen to anyone.