KP + DA* 16-50 lens create severe camera lag

soaptrail · 06-16-2019, 08:39 PM

I bought a KP to replace my K-30 with the solenoid issue a couple months ago. Everything had been working just fine until last week when i was on vacation. I had been using my DA* 16-50 lens and i started to hear what sounded like mechanical noises from the camera and lens combo. after a couple hours I developed severe lag where hitting a button on the back on the KP did not work 66% of the time and when it does work it takes several seconds to load a sub menu like changing the ISO. If i change to another lens my KP works fine. If I put the DA* 16-50 on my K-30 it works (except the solenoid issue now and then). i called tech support and they suggested to upgrade my firmware to 1.1 which i did and still no difference. Anyone hear of this before? i have had to repair the SDM on this lens once already but if it was failing wouldn't i notice problems on my K-30 as well?

I will call tech support again this week but when i called last week the phone routed me to printer support instead of cameras. I am in the US.

**RobA_Oz** · 06-16-2019, 09:28 PM

Hi soaptrail, and welcome to Pentax Forums.

I haven’t heard of this behaviour, before, but it doesn’t mean others haven’t.

You say that you’ve tried other lenses on the KP, but were any of them SDM lenses? If they were the older screw-drive lenses, then it sounds like a camera body problem (possibly the SDM power supply contacts?). If not, I can’t help any further.

soaptrail · 06-17-2019, 04:52 AM

Originally posted by RobA_Oz

Hi soaptrail, and welcome to Pentax Forums.

I haven’t heard of this behaviour, before, but it doesn’t mean others haven’t.

You say that you’ve tried other lenses on the KP, but were any of them SDM lenses? If they were the older screw-drive lenses, then it sounds like a camera body problem (possibly the SDM power supply contacts?). If not, I can’t help any further.

I only have the one SDM drive lens. That would probably confirm if the lens or the camera is the issue if i had a second SDM lens. It is weird because despite the lag, i can still use the camera albeit it is painful and the focus was having issues when i heard the noises right before the lag started.

I bet it is the lens now that you ask.

**rogerstg** · 06-17-2019, 05:30 AM

I've had no problems with the two SDM lenses I have (DA* 16-50 and 50-135) on my KP. Maybe cleaning the lens contacts will help. Or maybe consider converting the lens to screw drive.

aurele · 06-17-2019, 06:07 AM

Originally posted by soaptrail

I bought a KP to replace my K-30 with the solenoid issue a couple months ago. Everything had been working just fine until last week when i was on vacation. I had been using my DA* 16-50 lens and i started to hear what sounded like mechanical noises from the camera and lens combo. after a couple hours I developed severe lag where hitting a button on the back on the KP did not work 66% of the time and when it does work it takes several seconds to load a sub menu like changing the ISO. If i change to another lens my KP works fine. If I put the DA* 16-50 on my K-30 it works (except the solenoid issue now and then). i called tech support and they suggested to upgrade my firmware to 1.1 which i did and still no difference. Anyone hear of this before? i have had to repair the SDM on this lens once already but if it was failing wouldn't i notice problems on my K-30 as well?

I will call tech support again this week but when i called last week the phone routed me to printer support instead of cameras. I am in the US.

Make sure that in-body correction for purple fringing, is not activated. Presse "Info" and have a look.

This can slow the camera quite a lot.

soaptrail · 06-17-2019, 08:11 PM

Originally posted by rogerstg

I've had no problems with the two SDM lenses I have (DA* 16-50 and 50-135) on my KP. Maybe cleaning the lens contacts will help. Or maybe consider converting the lens to screw drive.

i used a cloth on the contacts, is that the correct way to clean them?

soaptrail · 06-17-2019, 08:15 PM

Originally posted by aurele

Make sure that in-body correction for purple fringing, is not activated. Presse "Info" and have a look.

This can slow the camera quite a lot.

i checked and only the two noise reductions, the shadow correction and shake reduction are enabled. I tried switching to the electronic shutter but no luck there either. Probably something broke in the lens or camera based on the bad sound i initially heard.

**rogerstg** · 06-18-2019, 06:30 AM

Originally posted by soaptrail

i used a cloth on the contacts, is that the correct way to clean them?

That's what I'd do, maybe with a little alcohol or even lens cleaning fluid. It seems like something happened within the lens though.

06-16-2019, 08:39 PM	#1
soaptrail New Member Join Date: Jun 2019 Posts: 4	*KP + DA 16-50 lens create severe camera lag** I bought a KP to replace my K-30 with the solenoid issue a couple months ago. Everything had been working just fine until last week when i was on vacation. I had been using my DA* 16-50 lens and i started to hear what sounded like mechanical noises from the camera and lens combo. after a couple hours I developed severe lag where hitting a button on the back on the KP did not work 66% of the time and when it does work it takes several seconds to load a sub menu like changing the ISO. If i change to another lens my KP works fine. If I put the DA* 16-50 on my K-30 it works (except the solenoid issue now and then). i called tech support and they suggested to upgrade my firmware to 1.1 which i did and still no difference. Anyone hear of this before? i have had to repair the SDM on this lens once already but if it was failing wouldn't i notice problems on my K-30 as well? I will call tech support again this week but when i called last week the phone routed me to printer support instead of cameras. I am in the US.

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06-16-2019, 09:28 PM	#2
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	Hi soaptrail, and welcome to Pentax Forums. I haven’t heard of this behaviour, before, but it doesn’t mean others haven’t. You say that you’ve tried other lenses on the KP, but were any of them SDM lenses? If they were the older screw-drive lenses, then it sounds like a camera body problem (possibly the SDM power supply contacts?). If not, I can’t help any further.

06-17-2019, 04:52 AM	#3
soaptrail New Member Join Date: Jun 2019 Posts: 4 Original Poster	Originally posted by RobA_Oz Hi soaptrail, and welcome to Pentax Forums. I haven’t heard of this behaviour, before, but it doesn’t mean others haven’t. You say that you’ve tried other lenses on the KP, but were any of them SDM lenses? If they were the older screw-drive lenses, then it sounds like a camera body problem (possibly the SDM power supply contacts?). If not, I can’t help any further. I only have the one SDM drive lens. That would probably confirm if the lens or the camera is the issue if i had a second SDM lens. It is weird because despite the lag, i can still use the camera albeit it is painful and the focus was having issues when i heard the noises right before the lag started. I bet it is the lens now that you ask.

06-17-2019, 05:30 AM	#4
rogerstg Loyal Site Supporter Join Date: Oct 2007 Location: Rhode Island Photos: Albums Posts: 1,168	I've had no problems with the two SDM lenses I have (DA* 16-50 and 50-135) on my KP. Maybe cleaning the lens contacts will help. Or maybe consider converting the lens to screw drive.

06-17-2019, 06:07 AM	#5
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	Originally posted by soaptrail I bought a KP to replace my K-30 with the solenoid issue a couple months ago. Everything had been working just fine until last week when i was on vacation. I had been using my DA* 16-50 lens and i started to hear what sounded like mechanical noises from the camera and lens combo. after a couple hours I developed severe lag where hitting a button on the back on the KP did not work 66% of the time and when it does work it takes several seconds to load a sub menu like changing the ISO. If i change to another lens my KP works fine. If I put the DA* 16-50 on my K-30 it works (except the solenoid issue now and then). i called tech support and they suggested to upgrade my firmware to 1.1 which i did and still no difference. Anyone hear of this before? i have had to repair the SDM on this lens once already but if it was failing wouldn't i notice problems on my K-30 as well? I will call tech support again this week but when i called last week the phone routed me to printer support instead of cameras. I am in the US. Make sure that in-body correction for purple fringing, is not activated. Presse "Info" and have a look. This can slow the camera quite a lot.

06-17-2019, 08:11 PM	#6
soaptrail New Member Join Date: Jun 2019 Posts: 4 Original Poster	Originally posted by rogerstg I've had no problems with the two SDM lenses I have (DA* 16-50 and 50-135) on my KP. Maybe cleaning the lens contacts will help. Or maybe consider converting the lens to screw drive. i used a cloth on the contacts, is that the correct way to clean them?

06-17-2019, 08:15 PM	#7
soaptrail New Member Join Date: Jun 2019 Posts: 4 Original Poster	Originally posted by aurele Make sure that in-body correction for purple fringing, is not activated. Presse "Info" and have a look. This can slow the camera quite a lot. i checked and only the two noise reductions, the shadow correction and shake reduction are enabled. I tried switching to the electronic shutter but no luck there either. Probably something broke in the lens or camera based on the bad sound i initially heard.

06-18-2019, 06:30 AM	#8
rogerstg Loyal Site Supporter Join Date: Oct 2007 Location: Rhode Island Photos: Albums Posts: 1,168	Originally posted by soaptrail i used a cloth on the contacts, is that the correct way to clean them? That's what I'd do, maybe with a little alcohol or even lens cleaning fluid. It seems like something happened within the lens though.