Front focus and back focus K-5

rawr · 03-07-2012, 09:56 PM

Originally posted by Markbrumbaugh

Would CIF also work then?

Yes, CIF works with manual lenses, due to this ability of the camera to detect something coming into focus even with manual lenses.

Page 134 of the K-5 manual set out how to set it up.

Markbrumbaugh · 03-08-2012, 03:51 PM

Too cool. I think I remembered that, I may have to give that a try.

Nick Siebers · 03-09-2012, 03:12 PM

Update - got the replacement, and it is fantastic! Not only is the focus much better (spot on with 43mm, +3 with FA 20-35) but the images look way, way better. Plus the shutter count is much less, too. Score!

I had been feeling like there wasn't much of an upgrade from the k20, but I think I have to conclude I just had a subpar K5.

Wompa · 03-19-2012, 09:33 AM

I quite new but can adjust the camera for the moment.

But alot of times the focus is just horrible.... I just eyeball the photos and alot of times the focus it completly off. I cant see why and I have tested with different dof and aperture.
The lense is a DA35 2.4 with a K5.
I can understand that 2.4 is a bit on the heroic side but when I get FF and BF shots at aperture 8 outside in daylight I dont know why it doesnt work properly.

I have adjusted the lens to -9... seems like alot for a new camera and a new lense!

jmg257 · 03-19-2012, 01:52 PM

Are you sure of your focus point? I.E. that the camera is focusing on exactly what you want it to?

What version firmware is it at?

westmill · 03-19-2012, 02:00 PM

Originally posted by jmg257

Are you sure of your focus point? I.E. that the camera is focusing on exactly what you want it to?

What version firmware is it at?

yup ! I think Im thinking what your thinking

Wompa · 03-21-2012, 02:06 AM

Originally posted by westmill

yup ! I think Im thinking what your thinking

I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far!

zapp · 03-21-2012, 02:39 AM

Originally posted by allantois

So far I have tested five lenses for FF or BF on the k-5:

FA 50 f1.4
FA 35 f2.0
FA 20 f2.8
Sigma 70 f2.8 macro
Sigma 15mm F2.8 fisheye

Every one is spot on with no fine adjustment necessary. They all had some BF or FF on the K100d.

Nice.

Allan

What exactly have you tested? How did oyu test it? That your image is in focus? The effect of different aperture setting on image sharpness...

The need for fine adjustment does not tell anything about the lens, but much more about the camera being in adjustment or not. At the same time there is a software tool for "rough" adjustment, so each fine adjustment is related to the setting or the rough adjustment and thus not comparable. Lenses basically need +/-3 steps relative to each other, but the camera can be off by much more. My lenses vary between +5 and +8 on a K5 after QS tuning of the rough focus adjustment. Before that the adjustment was 10 and off the screen.... Actually the whole system was off, but tuning at different places all focus aids work now for me.
Center focus point if off by a focus square up and left in my K5... I WANT LIVE VIEW FOUCS IN THE VIEWFINDER

jmg257 · 03-21-2012, 05:03 AM

Originally posted by Wompa

I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far!

The focus sensors are much bigger then the AF points - they stretch out in 4 directions like a continuous 3x3 line grid; so for instance the center focus area is a tall and wide (but skinny armed) + as big as the spot metering circle. Be sure what edge or point of contrast it decided to lock on.

westmill · 03-21-2012, 07:27 AM

Originally posted by Wompa

I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far!

Stop seeing the square as your autofocus point and use
the semicircle instead. If you try and focus on the eye...
since the autofocus area is so large it may latch onto the nose or ear or even miss altogether. This is why most think they have problems. Basicly... be less critical... instead of trying to focus on the eye, just focus on the face. If critical focus is important, use manual.
Watch your problems fade away

zapp · 03-22-2012, 07:58 AM

Originally posted by westmill

Stop seeing the square as your autofocus point and use
the semicircle instead. If you try and focus on the eye...
since the autofocus area is so large it may latch onto the nose or ear or even miss altogether. This is why most think they have problems. Basicly... be less critical... instead of trying to focus on the eye, just focus on the face. If critical focus is important, use manual.
Watch your problems fade away

Manual is not at all better than AF, but assuming that the camera is aligned, you have much more control.

westmill · 03-22-2012, 09:47 AM

Originally posted by zapp

Manual is not at all better than AF, but assuming that the camera is aligned, you have much more control.

I think you have totaly missread and the point

**jeffshaddix** · 03-31-2012, 12:36 AM

Originally posted by supertrac

How is the K-5's start up sound? does it scare dogs still like K-7?

Mine is crazy quiet, so much so that I wonder if DR is working when compared to the K-7.

My focus confirmation light is noticeably front focusing with manual lenses. Changing the global AF adjustment didn't seem to make a difference, have you guys seen that at all?

ChrisJ · 03-31-2012, 03:19 AM

When using manual focus it's important to set the dioptre on the viewfinder to your eye, then when the camera is in focus so is the view in the viewfinder. Even using your other eye can be different. But that's probably my old age.

Chris

Pontax · 03-31-2012, 05:20 AM

I have made some adjustments on my K5 with a MF lens (-3 apply all). But my AF lens needs something like +5. Now, apply all overrules apply one, so how can I adjust the AF lens?

03-21-2012, 05:03 AM	#39
jmg257 Inactive Account Join Date: Jan 2012 Posts: 202	Originally posted by Wompa I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far! The focus sensors are much bigger then the AF points - they stretch out in 4 directions like a continuous 3x3 line grid; so for instance the center focus area is a tall and wide (but skinny armed) + as big as the spot metering circle. Be sure what edge or point of contrast it decided to lock on. Last edited by jmg257; 03-21-2012 at 09:22 AM.

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03-07-2012, 09:56 PM	#31
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by Markbrumbaugh Would CIF also work then? Yes, CIF works with manual lenses, due to this ability of the camera to detect something coming into focus even with manual lenses. Page 134 of the K-5 manual set out how to set it up.

03-08-2012, 03:51 PM	#32
Markbrumbaugh Forum Member Join Date: Oct 2011 Posts: 77	Too cool. I think I remembered that, I may have to give that a try.

03-09-2012, 03:12 PM	#33
Nick Siebers Veteran Member Join Date: Jun 2008 Location: Madison, WI Photos: Gallery \| Albums Posts: 2,165	Update - got the replacement, and it is fantastic! Not only is the focus much better (spot on with 43mm, +3 with FA 20-35) but the images look way, way better. Plus the shutter count is much less, too. Score! I had been feeling like there wasn't much of an upgrade from the k20, but I think I have to conclude I just had a subpar K5.

03-19-2012, 09:33 AM	#34
Wompa Junior Member Join Date: Dec 2007 Location: Sweden, Västerås Posts: 25	I quite new but can adjust the camera for the moment. But alot of times the focus is just horrible.... I just eyeball the photos and alot of times the focus it completly off. I cant see why and I have tested with different dof and aperture. The lense is a DA35 2.4 with a K5. I can understand that 2.4 is a bit on the heroic side but when I get FF and BF shots at aperture 8 outside in daylight I dont know why it doesnt work properly. I have adjusted the lens to -9... seems like alot for a new camera and a new lense!

03-19-2012, 01:52 PM	#35
jmg257 Inactive Account Join Date: Jan 2012 Posts: 202	Are you sure of your focus point? I.E. that the camera is focusing on exactly what you want it to? What version firmware is it at?

03-19-2012, 02:00 PM	#36
westmill Veteran Member Join Date: Jan 2012 Location: Stoke on Trent Photos: Gallery \| Albums Posts: 1,146	Originally posted by jmg257 Are you sure of your focus point? I.E. that the camera is focusing on exactly what you want it to? What version firmware is it at? yup ! I think Im thinking what your thinking

03-21-2012, 02:06 AM	#37
Wompa Junior Member Join Date: Dec 2007 Location: Sweden, Västerås Posts: 25	Originally posted by westmill yup ! I think Im thinking what your thinking I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far!

03-21-2012, 02:39 AM	#38
zapp Pentaxian Join Date: Jul 2011 Posts: 2,385	Originally posted by allantois So far I have tested five lenses for FF or BF on the k-5: FA 50 f1.4 FA 35 f2.0 FA 20 f2.8 Sigma 70 f2.8 macro Sigma 15mm F2.8 fisheye Every one is spot on with no fine adjustment necessary. They all had some BF or FF on the K100d. Nice. Allan What exactly have you tested? How did oyu test it? That your image is in focus? The effect of different aperture setting on image sharpness... The need for fine adjustment does not tell anything about the lens, but much more about the camera being in adjustment or not. At the same time there is a software tool for "rough" adjustment, so each fine adjustment is related to the setting or the rough adjustment and thus not comparable. Lenses basically need +/-3 steps relative to each other, but the camera can be off by much more. My lenses vary between +5 and +8 on a K5 after QS tuning of the rough focus adjustment. Before that the adjustment was 10 and off the screen.... Actually the whole system was off, but tuning at different places all focus aids work now for me. Center focus point if off by a focus square up and left in my K5... I WANT LIVE VIEW FOUCS IN THE VIEWFINDER

03-21-2012, 07:27 AM	#40
westmill Veteran Member Join Date: Jan 2012 Location: Stoke on Trent Photos: Gallery \| Albums Posts: 1,146	Originally posted by Wompa I use the one center point focus. And firmware 1.13... Some rare times the picture is good and alot of times its off by far! Stop seeing the square as your autofocus point and use the semicircle instead. If you try and focus on the eye... since the autofocus area is so large it may latch onto the nose or ear or even miss altogether. This is why most think they have problems. Basicly... be less critical... instead of trying to focus on the eye, just focus on the face. If critical focus is important, use manual. Watch your problems fade away

03-22-2012, 07:58 AM	#41
zapp Pentaxian Join Date: Jul 2011 Posts: 2,385	Originally posted by westmill Stop seeing the square as your autofocus point and use the semicircle instead. If you try and focus on the eye... since the autofocus area is so large it may latch onto the nose or ear or even miss altogether. This is why most think they have problems. Basicly... be less critical... instead of trying to focus on the eye, just focus on the face. If critical focus is important, use manual. Watch your problems fade away Manual is not at all better than AF, but assuming that the camera is aligned, you have much more control.

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03-22-2012, 09:47 AM	#42
westmill Veteran Member Join Date: Jan 2012 Location: Stoke on Trent Photos: Gallery \| Albums Posts: 1,146	Originally posted by zapp Manual is not at all better than AF, but assuming that the camera is aligned, you have much more control. I think you have totaly missread and the point

03-31-2012, 12:36 AM	#43
jeffshaddix Site Supporter Join Date: Jun 2010 Location: Colorado Posts: 1,473	Originally posted by supertrac How is the K-5's start up sound? does it scare dogs still like K-7? Mine is crazy quiet, so much so that I wonder if DR is working when compared to the K-7. My focus confirmation light is noticeably front focusing with manual lenses. Changing the global AF adjustment didn't seem to make a difference, have you guys seen that at all?

03-31-2012, 03:19 AM	#44
ChrisJ Veteran Member Join Date: Nov 2008 Location: Eckington, Derbyshire UK Photos: Gallery \| Albums Posts: 316	When using manual focus it's important to set the dioptre on the viewfinder to your eye, then when the camera is in focus so is the view in the viewfinder. Even using your other eye can be different. But that's probably my old age. Chris

03-31-2012, 05:20 AM	#45
Pontax Senior Member Join Date: Oct 2011 Location: Bornholm Photos: Gallery \| Albums Posts: 160	I have made some adjustments on my K5 with a MF lens (-3 apply all). But my AF lens needs something like +5. Now, apply all overrules apply one, so how can I adjust the AF lens?