Debug Mode to adjust for Back Focus

**merengue** · 06-17-2012, 11:09 AM

I just used PK-Tether App. Debug Mode to adjust AF because all lenses were back focusing a lot. I had to add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses. This seems like a large adjustment to me so I’m curious if anyone else has had to do something similar.
Earl

stormtech · 06-17-2012, 12:49 PM

Originally posted by merengue

I just used PK-Tether App. Debug Mode to adjust AF because all lenses were back focusing a lot. I had to add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses. This seems like a large adjustment to me so I’m curious if anyone else has had to do something similar.
Earl

I had a similar problem a couple months ago - ended up sending it in to CRIS for warranty repair. It came back with the AF dead on for all my lenses. The camera was fine when I first bought it new, but sometime in the first 5 months of ownership the AF went weird on me. As you say, I had a few lenses that with even a -10 AF adjustment would not be enough to focus properly when they were all fine when the camera was new.

LowVoltage · 06-17-2012, 01:33 PM

Originally posted by stormtech

I had a similar problem a couple months ago - ended up sending it in to CRIS for warranty repair.

Just out of curiosity, what model was your camera, Stan? I'm guessing it's the K-5 you have listed in your signature tag. I'm trying to figure out something similar on my K-5.

Originally posted by stormtech

It came back with the AF dead on for all my lenses.

I had to re-read this a couple times; my first run through my brain immediately went to "it came back with my autofocus dead." Like, non-functioning.

rawr · 06-17-2012, 04:22 PM

Originally posted by merengue

add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses.

That is an awful lot of AF adjustment, especially uniformly across all those lenses.
Maybe you actually need to adjust your dioptre instead of your AF

stormtech · 06-17-2012, 10:29 PM

Originally posted by LowVoltage

Just out of curiosity, what model was your camera, Stan? I'm guessing it's the K-5 you have listed in your signature tag. I'm trying to figure out something similar on my K-5.

I had to re-read this a couple times; my first run through my brain immediately went to "it came back with my autofocus dead." Like, non-functioning.

Sorry for the confusion!

Yes, it was my K-5. And when I got the camera back from repair, the AF was perfect on all my lenses without touching the AF adjustment.

sterretje · 06-18-2012, 02:32 AM

Originally posted by rawr

Maybe you actually need to adjust your dioptre instead of your AF

Duh? Wonder how that effects the final image

Rhoel Maliksi · 06-18-2012, 08:15 PM

i had to adjust mine about +100um to set my af finetune back to "0"... for all my lenses (18-55wr, 50-200wr, 40xs)

lightsleuth · 06-20-2012, 08:12 AM

Just wondering how difficult it is to do this adjustment. Are there any instructions for doing this, or is is something that the average intelligence user should not attempt?

thanks,
Steve.

**merengue** · 06-21-2012, 11:20 AM

Originally posted by lightsleuth

Just wondering how difficult it is to do this adjustment. Are there any instructions for doing this, or is is something that the average intelligence user should not attempt?

thanks,
Steve.

It is not difficult to do. Instructions are in various threads about Debug Mode in the PK-Tether application.

bossa · 07-18-2012, 06:14 PM

Does entering debug mode void your warranty?

06-17-2012, 11:09 AM	#1
merengue Site Supporter Join Date: Oct 2007 Location: Madrid, Spain Posts: 117	Debug Mode to adjust for Back Focus I just used PK-Tether App. Debug Mode to adjust AF because all lenses were back focusing a lot. I had to add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses. This seems like a large adjustment to me so I’m curious if anyone else has had to do something similar. Earl

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06-17-2012, 12:49 PM	#2
stormtech Veteran Member Join Date: Jan 2011 Location: In the boonies (NW Penna) Photos: Gallery \| Albums Posts: 5,744	Originally posted by merengue I just used PK-Tether App. Debug Mode to adjust AF because all lenses were back focusing a lot. I had to add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses. This seems like a large adjustment to me so I’m curious if anyone else has had to do something similar. Earl I had a similar problem a couple months ago - ended up sending it in to CRIS for warranty repair. It came back with the AF dead on for all my lenses. The camera was fine when I first bought it new, but sometime in the first 5 months of ownership the AF went weird on me. As you say, I had a few lenses that with even a -10 AF adjustment would not be enough to focus properly when they were all fine when the camera was new.

06-17-2012, 01:33 PM	#3
LowVoltage Veteran Member Join Date: Jul 2009 Location: Mount Joy, PA Photos: Gallery Posts: 544	Originally posted by stormtech I had a similar problem a couple months ago - ended up sending it in to CRIS for warranty repair. Just out of curiosity, what model was your camera, Stan? I'm guessing it's the K-5 you have listed in your signature tag. I'm trying to figure out something similar on my K-5. Originally posted by stormtech It came back with the AF dead on for all my lenses. I had to re-read this a couple times; my first run through my brain immediately went to "it came back with my autofocus dead." Like, non-functioning.

06-17-2012, 04:22 PM	#4
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by merengue add 200 UM in order to use the AF Fine Adjustment for each of my 6 FA/DA lenses. That is an awful lot of AF adjustment, especially uniformly across all those lenses. Maybe you actually need to adjust your dioptre instead of your AF

06-17-2012, 10:29 PM	#5
stormtech Veteran Member Join Date: Jan 2011 Location: In the boonies (NW Penna) Photos: Gallery \| Albums Posts: 5,744	Originally posted by LowVoltage Just out of curiosity, what model was your camera, Stan? I'm guessing it's the K-5 you have listed in your signature tag. I'm trying to figure out something similar on my K-5. I had to re-read this a couple times; my first run through my brain immediately went to "it came back with my autofocus dead." Like, non-functioning. Sorry for the confusion! Yes, it was my K-5. And when I got the camera back from repair, the AF was perfect on all my lenses without touching the AF adjustment.

06-18-2012, 02:32 AM	#6
sterretje Veteran Member Join Date: Dec 2008 Location: Roodepoort, South Africa Photos: Gallery \| Albums Posts: 3,561	Originally posted by rawr Maybe you actually need to adjust your dioptre instead of your AF Duh? Wonder how that effects the final image

06-18-2012, 08:15 PM	#7
Rhoel Maliksi New Member Join Date: Jun 2012 Posts: 12	i had to adjust mine about +100um to set my af finetune back to "0"... for all my lenses (18-55wr, 50-200wr, 40xs)

06-20-2012, 08:12 AM	#8
lightsleuth Junior Member Join Date: Jul 2010 Location: Winnipeg Posts: 33	Just wondering how difficult it is to do this adjustment. Are there any instructions for doing this, or is is something that the average intelligence user should not attempt? thanks, Steve.

06-21-2012, 11:20 AM	#9
merengue Site Supporter Join Date: Oct 2007 Location: Madrid, Spain Posts: 117 Original Poster	Originally posted by lightsleuth Just wondering how difficult it is to do this adjustment. Are there any instructions for doing this, or is is something that the average intelligence user should not attempt? thanks, Steve. It is not difficult to do. Instructions are in various threads about Debug Mode in the PK-Tether application.

07-18-2012, 06:14 PM	#10
bossa Veteran Member Join Date: Jul 2011 Location: Adelaide Posts: 4,546	Does entering debug mode void your warranty?