KP AF issue

stevejo · 11-23-2020, 06:59 AM

Had my KP for a week now. Been very good so far but just now whilst checking through some menu items I noticed that the lens wasn't focussing when using the viewfinder. In all of the standard modes this is set to AF-S when using the viewfinder. Checked with another lens and it is the same. If I switch to one of my user modes which is set to the same AF settings. It seems to work fine. Odd to say the least. I cant see any setting that would stop the AF working. As luck would have it the low battery warning came on so can't proceed further until I have put some more volts in the battery (I have another battery on order but not arrived yet).

Has anyone had any similiar instances?

Detail.
DA 18-55 (old type), Mode Av/TAv/M, AF on, AF mode AF-S - autofocus not working - no indicator lights Mode U4 af working ok.
SMC FA 1.4 Mode Av/TAv/M, AF on, AF mode AF-S - autofocus not working - no indicator lights Mode U4 af working ok.
Was all working ok yesterday.

Will expand once power has been restored.

pschlute · 11-23-2020, 07:07 AM - **2 Likes**

Originally posted by stevejo

I cant see any setting that would stop the AF working

Sounds like you have changed a setting for AF. There will be options to use Back-Button Focus, and one of those disables the AF on shutter button half press

Your user modes will not be affected by this setting which is why I suspect they still work.

stevejo · 11-23-2020, 07:15 AM - **2 Likes**

Originally posted by pschlute

Sounds like you have changed a setting for AF. There will be options to use Back-Button Focus, and one of those disables the AF on shutter button half press

Your user modes will not be affected by this setting which is why I suspect they still work.

Thanks Peter. I don't think I set that, but there are so many settings to play with it is most likely something like that.

---------- Post added 23-11-20 at 07:34 AM ----------

Thanks again for the tip. The rear button was set to AF2 which you say, disables AF on the shutter button. Strange I never noticed as my usual default mode is Av.
Anyway, sorted now.

**DWS1** · 11-23-2020, 05:31 PM

It is so quick and easy to inadvertently change a setting somewhere that will cause so much time and troubleshooting to straighten out.

shyrsio · 11-24-2020, 02:53 PM

Try dismounting the lens and checking the AF screw on both the body and the lens. make sure the AF/MF switch is fully turned also.
You might also want to uncheck the "catch in focus" feature if its checked.

pschlute · 11-25-2020, 01:20 PM

Originally posted by shyrsio

Try dismounting the lens and checking the AF screw on both the body and the lens. make sure the AF/MF switch is fully turned also.
You might also want to uncheck the "catch in focus" feature if its checked.

I think he found the problem

Originally posted by stevejo

The rear button was set to AF2 which you say, disables AF on the shutter button.
Anyway, sorted now.

**K2 to K50** · 02-02-2021, 05:09 PM

Originally posted by stevejo

As luck would have it the low battery warning came on so can't proceed further until I have put some more volts in the battery (I have another battery on order but not arrived yet).

I have recently been experiencing poor autofocus results with my KP and the 55-300 PLM lens - and then noticed low battery prob. This (temporal connection between poorly focused shots and low battery) has happened a few times. I was just about to start a new thread on the subject but decided to do a search first, and found this thread.

Am also searching through a few other threads to see if others have made the same connection.

11-23-2020, 06:59 AM	#1
stevejo Pentaxian Join Date: Nov 2020 Location: Worcestershire, UK Photos: Albums Posts: 527	KP AF issue Had my KP for a week now. Been very good so far but just now whilst checking through some menu items I noticed that the lens wasn't focussing when using the viewfinder. In all of the standard modes this is set to AF-S when using the viewfinder. Checked with another lens and it is the same. If I switch to one of my user modes which is set to the same AF settings. It seems to work fine. Odd to say the least. I cant see any setting that would stop the AF working. As luck would have it the low battery warning came on so can't proceed further until I have put some more volts in the battery (I have another battery on order but not arrived yet). Has anyone had any similiar instances? Detail. DA 18-55 (old type), Mode Av/TAv/M, AF on, AF mode AF-S - autofocus not working - no indicator lights Mode U4 af working ok. SMC FA 1.4 Mode Av/TAv/M, AF on, AF mode AF-S - autofocus not working - no indicator lights Mode U4 af working ok. Was all working ok yesterday. Will expand once power has been restored.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
KP vs K-70 - to KP or not to KP, that is the question	OldChE	Pentax DSLR Discussion	28	11-02-2019 05:29 AM
KP bug or KP Broken, Av Mode and Red Blinky Warning Text in LV	BruceBanner	Pentax KP	26	06-25-2019 05:06 PM
KP af vs K-1 af	Ketsuppi11	Pentax DSLR Discussion	5	12-25-2018 11:55 AM
KP Overheating? To KP or not...	MrStupid	Pentax KP	28	07-12-2018 09:50 PM
Pentax KP AF issue	08amczb	Pentax KP	37	06-30-2018 04:08 AM

11-23-2020, 07:07 AM - 2 Likes	#2
pschlute Moderator Loyal Site Supporter Join Date: Mar 2007 Location: Surrey, UK Photos: Gallery Posts: 8,202	Originally posted by stevejo I cant see any setting that would stop the AF working Sounds like you have changed a setting for AF. There will be options to use Back-Button Focus, and one of those disables the AF on shutter button half press Your user modes will not be affected by this setting which is why I suspect they still work.

11-23-2020, 07:15 AM - 2 Likes	#3
stevejo Pentaxian Join Date: Nov 2020 Location: Worcestershire, UK Photos: Albums Posts: 527 Original Poster	Originally posted by pschlute Sounds like you have changed a setting for AF. There will be options to use Back-Button Focus, and one of those disables the AF on shutter button half press Your user modes will not be affected by this setting which is why I suspect they still work. Thanks Peter. I don't think I set that, but there are so many settings to play with it is most likely something like that. ---------- Post added 23-11-20 at 07:34 AM ---------- Thanks again for the tip. The rear button was set to AF2 which you say, disables AF on the shutter button. Strange I never noticed as my usual default mode is Av. Anyway, sorted now.

11-23-2020, 05:31 PM	#4
DWS1 Site Supporter Join Date: Aug 2018 Location: Arkansas, USA Posts: 1,169	It is so quick and easy to inadvertently change a setting somewhere that will cause so much time and troubleshooting to straighten out.

11-24-2020, 02:53 PM	#5
shyrsio Pentaxian Join Date: Apr 2016 Location: Tirana Posts: 780	Try dismounting the lens and checking the AF screw on both the body and the lens. make sure the AF/MF switch is fully turned also. You might also want to uncheck the "catch in focus" feature if its checked.

11-25-2020, 01:20 PM	#6
pschlute Moderator Loyal Site Supporter Join Date: Mar 2007 Location: Surrey, UK Photos: Gallery Posts: 8,202	Originally posted by shyrsio Try dismounting the lens and checking the AF screw on both the body and the lens. make sure the AF/MF switch is fully turned also. You might also want to uncheck the "catch in focus" feature if its checked. I think he found the problem Originally posted by stevejo The rear button was set to AF2 which you say, disables AF on the shutter button. Anyway, sorted now.

02-02-2021, 05:09 PM	#7
K2 to K50 Loyal Site Supporter Join Date: Jan 2019 Location: Ipswich QLD Australia Photos: Gallery \| Albums Posts: 4,794	Originally posted by stevejo As luck would have it the low battery warning came on so can't proceed further until I have put some more volts in the battery (I have another battery on order but not arrived yet). I have recently been experiencing poor autofocus results with my KP and the 55-300 PLM lens - and then noticed low battery prob. This (temporal connection between poorly focused shots and low battery) has happened a few times. I was just about to start a new thread on the subject but decided to do a search first, and found this thread. Am also searching through a few other threads to see if others have made the same connection.