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jayman_1975 · 10-23-2016, 07:42 PM

My 40xs on my K-01 started blowing focus intermittently pretty badly this summer after riding around in my quad bag while quading in the mountains. I kinda forgot about it.

Today I gave the camera to my wife to take pics of our daughters birthday party. When I got home I looked at the pics and I think only 3 of them were in focus.

Now here's the odd thing, I can put a different lens on the K-01 and it works fine. I can also put the 40xs on my K5iis and it focuses great. Anyone have an explanation or theory on how the lens and camera can work fine separately until they are paired together? Prior to this summer bouncing around on the quad, this duo was wicked sharp, barely ever missed.

dewolf · 10-23-2016, 08:44 PM

bouncing around perhaps, just a stretch. perhaps the focal length or AF fine adjustment or some other setting in the bios got changed. check to make sure focal length and AF fine adjust are correct. and clean and examine the contacts on the lens and camera otherwise I would reset the camera to factory.

ajack · 10-24-2016, 10:47 AM

So what exactly happens with the the K-01 + 40XS? Is it focusing but doing a bad job, or is it not focusing at all?

Since the K-01 is mirrorless it only uses contrast AF unlike the DSLRs which use phase detection when in normal mode and contrast in Live View. I can't imagine how that would make a difference but maybe try your K-5 IIs in Live View mode just to make the comparison a little more accurate.

Any signs of damage to the 40XS?

jayman_1975 · 10-24-2016, 01:23 PM

It focuses but misses. No sign if damage. When I said the camera was bouncing around in my quad bag it made its sound worse than it was. It was in a camera bag, which was somewhat wrapped in coats and stuff which would have taken any hard hits out of the equation. There really isn't any physical damage. I took a pic with the 40xs on the k5ii in live view and it was bang on. I'll have a look at the contacts on the mount of the k-01 and see if there's anything to clean off

jayman_1975 · 10-26-2016, 07:35 AM

Well it seems I have it solved for now. I did notice the contacts and mount on the lens were dirty so I cleaned it all up and it seemed to help a little bit. It was still not tac sharp as it usually is so I tried the reset.....bingo. All is well. Thanks for the help.

dewolf · 10-26-2016, 07:50 AM

Originally posted by jayman_1975

Well it seems I have it solved for now. I did notice the contacts and mount on the lens were dirty so I cleaned it all up and it seemed to help a little bit. It was still not tac sharp as it usually is so I tried the reset.....bingo. All is well. Thanks for the help.

good to hear. sometimes my settings get wonky due to so many buttons while traveling and forgetting the camera was on. a reset usually gets me back to where I was. if you had any AF fine adjustments set you may have to reset them

**clackers** · 10-26-2016, 12:16 PM

Originally posted by dewolf

. if you had any AF fine adjustments set you may have to reset them

Didn't think the K-01 had PDAF!

dewolf · 10-26-2016, 12:31 PM

Originally posted by clackers

Didn't think the K-01 had PDAF!

I dont know if it does or doesnt, was just throwing it out there

jayman_1975 · 10-27-2016, 04:40 AM

Yeah it doesn't have and adjustments. Not sure what was going on but the reset did the trick!

jayman_1975 · 11-17-2016, 08:36 AM

An update......it seems it is indeed the 40xs that's acting up. It will intermittently take sharp pics on both my k-01 and K5IIs but then for some reason will revert back to missing focus. It is too unreliable to use like this so I'm going to have to bail on it. Too bad, it used to be razor sharp.

dewolf · 11-17-2016, 09:01 AM

Originally posted by jayman_1975

An update......it seems it is indeed the 40xs that's acting up. It will intermittently take sharp pics on both my k-01 and K5IIs but then for some reason will revert back to missing focus. It is too unreliable to use like this so I'm going to have to bail on it. Too bad, it used to be razor sharp.

a shame to be sure. any chance of sending it in for repair ?

jayman_1975 · 11-17-2016, 09:15 AM

I guess I could look into it. Might be cheaper than replacing it mind you then I don't get to go lens shopping 😉

10-23-2016, 07:42 PM	#1
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385	Lens quit focusing on K-01 but works fine on K5IIs My 40xs on my K-01 started blowing focus intermittently pretty badly this summer after riding around in my quad bag while quading in the mountains. I kinda forgot about it. Today I gave the camera to my wife to take pics of our daughters birthday party. When I got home I looked at the pics and I think only 3 of them were in focus. Now here's the odd thing, I can put a different lens on the K-01 and it works fine. I can also put the 40xs on my K5iis and it focuses great. Anyone have an explanation or theory on how the lens and camera can work fine separately until they are paired together? Prior to this summer bouncing around on the quad, this duo was wicked sharp, barely ever missed.

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10-23-2016, 08:44 PM	#2
dewolf Guest	bouncing around perhaps, just a stretch. perhaps the focal length or AF fine adjustment or some other setting in the bios got changed. check to make sure focal length and AF fine adjust are correct. and clean and examine the contacts on the lens and camera otherwise I would reset the camera to factory.

10-24-2016, 10:47 AM	#3
ajack Forum Member Join Date: May 2016 Location: Maine Posts: 95	So what exactly happens with the the K-01 + 40XS? Is it focusing but doing a bad job, or is it not focusing at all? Since the K-01 is mirrorless it only uses contrast AF unlike the DSLRs which use phase detection when in normal mode and contrast in Live View. I can't imagine how that would make a difference but maybe try your K-5 IIs in Live View mode just to make the comparison a little more accurate. Any signs of damage to the 40XS?

10-24-2016, 01:23 PM	#4
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385 Original Poster	It focuses but misses. No sign if damage. When I said the camera was bouncing around in my quad bag it made its sound worse than it was. It was in a camera bag, which was somewhat wrapped in coats and stuff which would have taken any hard hits out of the equation. There really isn't any physical damage. I took a pic with the 40xs on the k5ii in live view and it was bang on. I'll have a look at the contacts on the mount of the k-01 and see if there's anything to clean off

10-26-2016, 07:35 AM	#5
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385 Original Poster	Well it seems I have it solved for now. I did notice the contacts and mount on the lens were dirty so I cleaned it all up and it seemed to help a little bit. It was still not tac sharp as it usually is so I tried the reset.....bingo. All is well. Thanks for the help.

10-26-2016, 07:50 AM	#6
dewolf Guest	Originally posted by jayman_1975 Well it seems I have it solved for now. I did notice the contacts and mount on the lens were dirty so I cleaned it all up and it seemed to help a little bit. It was still not tac sharp as it usually is so I tried the reset.....bingo. All is well. Thanks for the help. good to hear. sometimes my settings get wonky due to so many buttons while traveling and forgetting the camera was on. a reset usually gets me back to where I was. if you had any AF fine adjustments set you may have to reset them

10-26-2016, 12:16 PM	#7
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by dewolf . if you had any AF fine adjustments set you may have to reset them Didn't think the K-01 had PDAF!

10-26-2016, 12:31 PM	#8
dewolf Guest	Originally posted by clackers Didn't think the K-01 had PDAF! I dont know if it does or doesnt, was just throwing it out there

10-27-2016, 04:40 AM	#9
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385 Original Poster	Yeah it doesn't have and adjustments. Not sure what was going on but the reset did the trick!

11-17-2016, 08:36 AM	#10
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385 Original Poster	An update......it seems it is indeed the 40xs that's acting up. It will intermittently take sharp pics on both my k-01 and K5IIs but then for some reason will revert back to missing focus. It is too unreliable to use like this so I'm going to have to bail on it. Too bad, it used to be razor sharp.

11-17-2016, 09:01 AM	#11
dewolf Guest	Originally posted by jayman_1975 An update......it seems it is indeed the 40xs that's acting up. It will intermittently take sharp pics on both my k-01 and K5IIs but then for some reason will revert back to missing focus. It is too unreliable to use like this so I'm going to have to bail on it. Too bad, it used to be razor sharp. a shame to be sure. any chance of sending it in for repair ?

11-17-2016, 09:15 AM	#12
jayman_1975 Veteran Member Join Date: Jun 2014 Posts: 385 Original Poster	I guess I could look into it. Might be cheaper than replacing it mind you then I don't get to go lens shopping 😉

Lens quit focusing on K-01 but works fine on K5IIs

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