K-1 autofocus?

firstfromleft · 01-19-2017, 11:06 AM

Halo, help me please, is it normal such a difference in sharpness between normal shot and live view? Every shot first with viewfinder, second with live view. Lens úentax 35mm f2 AL at f4. Thanks for your opinions!

Attached Images

**hyyz** · 01-19-2017, 11:20 AM

The ones taken with viewfinder are back-focused. Try to adjust AF by giving + values.

Huy · 01-19-2017, 11:25 AM

Looks like you need to perform focus adjustment for your camera+lens combo.

Focus using viewfinder use PDAF, therefore it's possible your camera+lens is back-focus or front-focus as shown in the Select pics.
Live View use CDAF therefore not affected. Therefore the candidate pics are always in focus perfectly.

You can refer to the manual to perform focus adjustment. I don't have the K-1 so that I can't give you the details, but I bet other members will chip in soon

firstfromleft · 01-19-2017, 01:24 PM

Originally posted by hyyz

The ones taken with viewfinder are back-focused. Try to adjust AF by giving + values.

thanks for reply, tried, but didn't helped. tried to +5 max, no change.

**clackers** · 01-19-2017, 01:38 PM

You can go up to +10.

If that's still not enough, there's something wrong with that lens (if your other lenses are okay).

firstfromleft · 01-19-2017, 01:44 PM

Originally posted by clackers

You can go up to +10.

If that's still not enough, there's something wrong with that lens (if your other lenses are okay).

sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR

Adam · 01-19-2017, 01:48 PM

Originally posted by firstfromleft

sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR

Different lenses often need different levels of adjustment. You should test the 24mm, methodically, on its own.

Fixing Front and Back Focus - The Remedy - In-Depth Articles

Adam
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**clackers** · 01-19-2017, 02:03 PM

Originally posted by firstfromleft

sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR

If all your other lenses need +10, and this one in fact needs more, the camera itself is to blame.

Its AF module is misaligned.

a5m · 01-19-2017, 04:15 PM

Just thought I'd put this out there in case you find it helpful. The quoted post below was in regards to the K-3 and focus adjustments but it may apply to the K-1 as well.

Originally posted by MJSfoto1956

I had this exact same behavior when I first got my K-3. Frustrating as all get out. FOR MY PARTICULAR CAMERA I "fixed" it my choosing +10 micro adjustment "for all lenses" (i.e. globally), then in addition to that I set micro adjustment for each lens individually. My theory: some K-3s are "right at the edge" with regards to AF adjustment and the AF algorithm exhibits random flaws under these conditions. By choosing a "global" adjustment I inadvertently put the adjustment back into the AF algorithm's "sweet spot" and things are now very well behaved.

YMMV

Michael

Link to original thread here

mee · 01-19-2017, 06:20 PM

Are you moving the focus ring on your lenses far out of focus and letting the camera refocus when trying different AF adjustments? That is crucial to finding the proper adjustment value.

Mr.Alan · 01-20-2017, 12:24 AM

Hello,
can you show us the exif-data?
How were the AF and metering settings?

Grretings
Alan

01-19-2017, 11:06 AM	#1
firstfromleft New Member Join Date: Aug 2016 Posts: 3	K-1 autofocus? Halo, help me please, is it normal such a difference in sharpness between normal shot and live view? Every shot first with viewfinder, second with live view. Lens úentax 35mm f2 AL at f4. Thanks for your opinions! Attached Images

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01-19-2017, 11:20 AM	#2
hyyz Site Supporter Join Date: Jan 2008 Location: Michigan Posts: 478	The ones taken with viewfinder are back-focused. Try to adjust AF by giving + values.

01-19-2017, 11:25 AM	#3
Huy Forum Member Join Date: Jan 2014 Photos: Gallery Posts: 87	Looks like you need to perform focus adjustment for your camera+lens combo. Focus using viewfinder use PDAF, therefore it's possible your camera+lens is back-focus or front-focus as shown in the Select pics. Live View use CDAF therefore not affected. Therefore the candidate pics are always in focus perfectly. You can refer to the manual to perform focus adjustment. I don't have the K-1 so that I can't give you the details, but I bet other members will chip in soon

01-19-2017, 01:24 PM	#4
firstfromleft New Member Join Date: Aug 2016 Posts: 3 Original Poster	Originally posted by hyyz The ones taken with viewfinder are back-focused. Try to adjust AF by giving + values. thanks for reply, tried, but didn't helped. tried to +5 max, no change.

01-19-2017, 01:38 PM	#5
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	You can go up to +10. If that's still not enough, there's something wrong with that lens (if your other lenses are okay).

01-19-2017, 01:44 PM	#6
firstfromleft New Member Join Date: Aug 2016 Posts: 3 Original Poster	Originally posted by clackers You can go up to +10. If that's still not enough, there's something wrong with that lens (if your other lenses are okay). sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR

01-19-2017, 01:48 PM	#7
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by firstfromleft sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR Different lenses often need different levels of adjustment. You should test the 24mm, methodically, on its own. Fixing Front and Back Focus - The Remedy - In-Depth Articles Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

01-19-2017, 02:03 PM	#8
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by firstfromleft sorry, I did +10. It is on all my lenses. 50mm 1.4 FA and 100mm 2.8 WR If all your other lenses need +10, and this one in fact needs more, the camera itself is to blame. Its AF module is misaligned.

01-19-2017, 04:15 PM	#9
a5m Veteran Member Join Date: Oct 2015 Photos: Gallery \| Albums Posts: 576	Just thought I'd put this out there in case you find it helpful. The quoted post below was in regards to the K-3 and focus adjustments but it may apply to the K-1 as well. Originally posted by MJSfoto1956 I had this exact same behavior when I first got my K-3. Frustrating as all get out. FOR MY PARTICULAR CAMERA I "fixed" it my choosing +10 micro adjustment "for all lenses" (i.e. globally), then in addition to that I set micro adjustment for each lens individually. My theory: some K-3s are "right at the edge" with regards to AF adjustment and the AF algorithm exhibits random flaws under these conditions. By choosing a "global" adjustment I inadvertently put the adjustment back into the AF algorithm's "sweet spot" and things are now very well behaved. YMMV Michael Link to original thread here

01-19-2017, 06:20 PM	#10
mee Veteran Member Join Date: May 2010 Posts: 7,403	Are you moving the focus ring on your lenses far out of focus and letting the camera refocus when trying different AF adjustments? That is crucial to finding the proper adjustment value.

01-20-2017, 12:24 AM	#11
Mr.Alan New Member Join Date: Jun 2016 Posts: 23	Hello, can you show us the exif-data? How were the AF and metering settings? Grretings Alan