K5 and DA*50-135mm

**Bramela** · 01-05-2011, 02:19 AM

I was just wondering, any K5 users out there, with a DA*50-135 lens? I am having focus problems and finding sharpness is hard to achieve even with AF fine adjustment in the menu. I never had any problem with K20d. In fact it was a brilliant combination.
Anybody finding this same problem. What do you recommend?

Attached Images

Usuqa · 01-05-2011, 03:15 AM

mine seems ok, going out with it soon so will do more shooting and let you know.

RonHendriks1966 · 01-05-2011, 03:17 AM

I hev not tried it on my current K-5 but I will go out this weekend with this combination. Maybe you can do some lenscalibration to correct it.

petes943 · 01-05-2011, 05:18 AM

I had similar problems with my K5 and 18-135. Check out page 75 in the K5 manual. Whole bunch of stuff listed that can give focusing problems. Things are getting better as I get used to fussy focusing but Pentax does need to do a fix.

Goethe · 01-05-2011, 05:29 AM

I have the same combo, and I to had some problems.
First of all it it didn't seem to adjust focus at all, as there wasn't enough power. So I had to give it som manual help.
Unfortunately my K-5 is in for a repair (FF issue), so I haven't dug further into the problem.
Let us know if you find out more about it.

And I totally agree with you about the K20 and 50-135. That was one of my favourites.

Delgado · 01-05-2011, 06:04 AM

I have used the DA* 50-135 (& DA* 16-50) on two K5s without focussing difficulties. I did, however, discover that DA* lenses are especially sensitive to grime on the contacts on the lens mount. This can lead to overexposure errors at rapid frame rates - typically with one image in four or five being about a stop or more overexposed. Clutch-driven lenses were not affected. I found that cleaning the contacts on the camera and the lenses resolved the problem.

i83N · 01-05-2011, 07:29 AM

just make calibration it will help (;

thomascdk · 01-05-2011, 08:56 AM

No problems here. Haven't tried the combo in dark environments though.

**Bramela** · 01-05-2011, 12:32 PM

Thanks all, for your comments, I will follow the advice given and get back to let you know how I get on.

Thanks.

cem.kumuk · 01-05-2011, 01:12 PM

A BF/FF test with my DA*50-135. It seems all okey. Focus on the "OK" button. Not bad.. Isn't it?

Also 2 more recent shots with DA*50-135

BEHIND THE WINDOWS

SEDUCING LOOKS

shang · 01-05-2011, 09:11 PM

mine combination of k-5 and da* 535 is "fine". Tackle sharp from 70--120, very tiny back focus at 50 and 135... that's the problem with zoom lenses, you can never find a good constant adjustment throughout the zoom range...

01-05-2011, 02:19 AM	#1
Bramela Site Supporter Join Date: Jan 2007 Location: Newcastle Australia Photos: Gallery \| Albums Posts: 5,281	*K5 and DA50-135mm** I was just wondering, any K5 users out there, with a DA*50-135 lens? I am having focus problems and finding sharpness is hard to achieve even with AF fine adjustment in the menu. I never had any problem with K20d. In fact it was a brilliant combination. Anybody finding this same problem. What do you recommend? Attached Images

01-05-2011, 01:12 PM	#10
cem.kumuk Senior Member Join Date: Jan 2010 Location: Istanbul Photos: Gallery Posts: 241	A BF/FF test with my DA50-135. It seems all okey. Focus on the "OK" button. Not bad.. Isn't it? Also 2 more recent shots with DA50-135 BEHIND THE WINDOWS SEDUCING LOOKS Attached Images

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01-05-2011, 03:15 AM	#2
Usuqa Veteran Member Join Date: Nov 2008 Location: Scotland Photos: Gallery Posts: 348	mine seems ok, going out with it soon so will do more shooting and let you know.

01-05-2011, 03:17 AM	#3
RonHendriks1966 Pentaxian Join Date: Jan 2009 Photos: Gallery Posts: 8,668	I hev not tried it on my current K-5 but I will go out this weekend with this combination. Maybe you can do some lenscalibration to correct it.

01-05-2011, 05:18 AM	#4
petes943 New Member Join Date: Jan 2011 Location: Florida Posts: 6	I had similar problems with my K5 and 18-135. Check out page 75 in the K5 manual. Whole bunch of stuff listed that can give focusing problems. Things are getting better as I get used to fussy focusing but Pentax does need to do a fix.

01-05-2011, 05:29 AM	#5
Goethe New Member Join Date: Nov 2010 Location: Kolbotn Posts: 4	I have the same combo, and I to had some problems. First of all it it didn't seem to adjust focus at all, as there wasn't enough power. So I had to give it som manual help. Unfortunately my K-5 is in for a repair (FF issue), so I haven't dug further into the problem. Let us know if you find out more about it. And I totally agree with you about the K20 and 50-135. That was one of my favourites.

01-05-2011, 06:04 AM	#6
Delgado Forum Member Join Date: Mar 2007 Location: London Posts: 71	I have used the DA* 50-135 (& DA* 16-50) on two K5s without focussing difficulties. I did, however, discover that DA* lenses are especially sensitive to grime on the contacts on the lens mount. This can lead to overexposure errors at rapid frame rates - typically with one image in four or five being about a stop or more overexposed. Clutch-driven lenses were not affected. I found that cleaning the contacts on the camera and the lenses resolved the problem.

01-05-2011, 07:29 AM	#7
i83N Pentaxian Join Date: Mar 2009 Location: Lithuania Photos: Gallery Posts: 1,145	just make calibration it will help (;

01-05-2011, 08:56 AM	#8
thomascdk Senior Member Join Date: Mar 2009 Location: Copenhagen Posts: 258	No problems here. Haven't tried the combo in dark environments though.

01-05-2011, 12:32 PM	#9
Bramela Site Supporter Join Date: Jan 2007 Location: Newcastle Australia Photos: Gallery \| Albums Posts: 5,281 Original Poster	Thanks all, for your comments, I will follow the advice given and get back to let you know how I get on. Thanks.

01-05-2011, 09:11 PM	#11
shang Senior Member Join Date: May 2010 Location: long island Posts: 135	mine combination of k-5 and da* 535 is "fine". Tackle sharp from 70--120, very tiny back focus at 50 and 135... that's the problem with zoom lenses, you can never find a good constant adjustment throughout the zoom range...