Pentax FA 50 f1.4 autofocus?

DrtimVIP · 08-06-2019, 02:34 PM

Hi all

Apologies if this is an absurd question as I’m a bit of a noob to Pentax.

I’ve gone a little lens wild and bought via eBay an FA 50mm f1.4 and noticed in the reviews here that it’s autofocus through a screw...

I have a Pentax KP and have no idea how to get my lens to autofocus. I’ve switched on the AF and nothing. On the camera the F value is flashing as it can’t pick it up from the dial.

Am I trying to get it to do something it can’t?

Thank you in anticipation!!

Tim

**BigMackCam** · 08-06-2019, 02:39 PM - **1 Like**

Hello and welcome to the forums

It sounds as if the camera isn't communicating properly with the lens. Assuming your other AF lenses are working fine with the camera, clean the lens' electrical contacts and the mount ring, then re-mount the lens and try again.

Let us know how you get on?

**jatrax** · 08-06-2019, 02:43 PM - **1 Like**

Make sure the lens is in the 'A' position on the aperture ring.

And no, you are not trying to do something the lens cannot do. It should function and autofocus on your camera with no issues if it is set up correctly.

**boriscleto** · 08-06-2019, 02:53 PM - **1 Like**

Make sure you push the little button on the aperture ring when setting it to A.

If it still doesn't work when set to the A position you might have to clean the contacts on the lens.

DrtimVIP · 08-06-2019, 03:13 PM

Thank you!

My camera is at work so as soon as I get in tomorrow I’ll be checking out that A! I hadn’t noticed it today.

dbs · 08-06-2019, 03:22 PM - **1 Like**

Hi Drtimvp

Welcome

You have to set in menu Aperature Permitted then all should be fine
I do not have a KP but it will be in the manual as to where
And the "A' setting on lens aswell

Dave

DrtimVIP · 08-07-2019, 03:49 AM

Thanks all!

I now have a functioning lens - can’t believe I didn’t spot the “A”. Bought a brand new sigma 70-210 f4-5.6 from a charity shop for £14 and that’s now working too!

Very appreciated.

08-06-2019, 02:34 PM	#1
DrtimVIP New Member Join Date: Jul 2019 Posts: 4	Pentax FA 50 f1.4 autofocus? Hi all Apologies if this is an absurd question as I’m a bit of a noob to Pentax. I’ve gone a little lens wild and bought via eBay an FA 50mm f1.4 and noticed in the reviews here that it’s autofocus through a screw... I have a Pentax KP and have no idea how to get my lens to autofocus. I’ve switched on the AF and nothing. On the camera the F value is flashing as it can’t pick it up from the dial. Am I trying to get it to do something it can’t? Thank you in anticipation!! Tim

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08-06-2019, 02:39 PM - 1 Like	#2
BigMackCam Digitiser of Film Join Date: Mar 2010 Location: North East of England Posts: 20,674	Hello and welcome to the forums It sounds as if the camera isn't communicating properly with the lens. Assuming your other AF lenses are working fine with the camera, clean the lens' electrical contacts and the mount ring, then re-mount the lens and try again. Let us know how you get on?

08-06-2019, 02:43 PM - 1 Like	#3
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Make sure the lens is in the 'A' position on the aperture ring. And no, you are not trying to do something the lens cannot do. It should function and autofocus on your camera with no issues if it is set up correctly.

08-06-2019, 02:53 PM - 1 Like	#4
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Make sure you push the little button on the aperture ring when setting it to A. If it still doesn't work when set to the A position you might have to clean the contacts on the lens.

08-06-2019, 03:13 PM	#5
DrtimVIP New Member Join Date: Jul 2019 Posts: 4 Original Poster	Thank you! My camera is at work so as soon as I get in tomorrow I’ll be checking out that A! I hadn’t noticed it today.

08-06-2019, 03:22 PM - 1 Like	#6
dbs Pentaxian Join Date: Jun 2010 Location: Clare Valley S A Photos: Albums Posts: 7,564	Hi Drtimvp Welcome You have to set in menu Aperature Permitted then all should be fine I do not have a KP but it will be in the manual as to where And the "A' setting on lens aswell Dave

08-07-2019, 03:49 AM	#7
DrtimVIP New Member Join Date: Jul 2019 Posts: 4 Original Poster	Thanks all! I now have a functioning lens - can’t believe I didn’t spot the “A”. Bought a brand new sigma 70-210 f4-5.6 from a charity shop for £14 and that’s now working too! Very appreciated.