Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-28-2009, 08:27 PM   #1
Inactive Account




Join Date: Aug 2009
Location: Hawaii
Photos: Gallery
Posts: 117
K-7 front focus solved

Hi All,

Very excited to tell you that using debug mode K-7 can adjust AF further than the in-menu.

Debug mode

Cheers,
Tony

09-29-2009, 08:04 AM   #2
Veteran Member




Join Date: Jan 2007
Location: New Mexico
Photos: Albums
Posts: 1,125
QuoteOriginally posted by fulcrumx29 Quote
Hi All,

Very excited to tell you that using debug mode K-7 can adjust AF further than the in-menu.

Debug mode

Cheers,
Tony
For me, websites such as "Pentax Hack" should carry a warning: Do not try this at home.

Rob
09-29-2009, 08:54 AM   #3
Senior Member
Rich_A's Avatar

Join Date: Aug 2009
Location: Montana
Photos: Gallery
Posts: 213
Maybe they could change their URL to "VoidYourWarranty.com"
09-29-2009, 10:49 AM   #4
Veteran Member
pcarfan's Avatar

Join Date: Sep 2007
Location: Dayton, Ohio
Photos: Gallery | Albums
Posts: 2,958
QuoteOriginally posted by fulcrumx29 Quote
Hi All,

Very excited to tell you that using debug mode K-7 can adjust AF further than the in-menu.

Debug mode

Cheers,
Tony
Tony, this is great. Does it still reatin the changes for each lens ?, or is it only for the whole camera. Also, like in the K10D, does it sya 'debug mode' on the LCD all the time?

Thanks.

09-29-2009, 12:51 PM   #5
Veteran Member
inferno10's Avatar

Join Date: Feb 2007
Location: San Francisco, California
Posts: 342
Tony, can you discuss what lenses you had FF issues with? I had a DA* 16-50 that would front-focus even at -10 adjustment. Were you able to adjust beyond that in debug?
09-29-2009, 02:28 PM   #6
Forum Member




Join Date: Jan 2009
Location: Berlin, Germany
Posts: 62
in a case like this, I would try to get that fixed on warranty basis. Can't you send in both, camera and lens for fix? Did that recently with K20D and a Tamron lens and both seem to focus quite accurately now.
09-29-2009, 02:47 PM   #7
Site Supporter




Join Date: Aug 2007
Location: Dayton, OH
Posts: 365
QuoteOriginally posted by pcarfan Quote
Tony, this is great. Does it still reatin the changes for each lens ?, or is it only for the whole camera. Also, like in the K10D, does it sya 'debug mode' on the LCD all the time?

Thanks.
The K10D only says "debug mode" when you leave debug mode enabled. You can disable debug mode, and it will still retain the AF correction you applied.
09-29-2009, 07:00 PM   #8
Inactive Account




Join Date: Aug 2009
Location: Hawaii
Photos: Gallery
Posts: 117
Original Poster
Hi All,

Despite what you are thinking, I am finding this way very pleasantly workable.

pcarfan,

Yes, it tune all lens using the debug menu and you can tune each of the 11 AF sensor individually! So the debug menu is setting up a base value. After that, you can then tune for each lens through the regular custom menu. Pls see my story below.

inferno10,

I bet this will solve your problem. My major problematic lens is FA 50/1.4 since it shows FF when I use chart very near to the lens. I once believe it need more than -10, but today when I try to optimize it with debug menu, I found it should be at -7. So pls make sure you need <-10 for your lens.

All my 3 lens FA 50, DA 16-45, DA 55-300 should be at -7,-6,-5 with no debug AF adjustments. Now I set them at -2,-1,-1 with the debug AF at -40 um. So now every lens seems not so negative and everything is tack on even with 50/1.4 at 1.4! You should definitely tune your K-7 to minus debug AF since according to my experience many K-7 are on the negative side. Problem will only occur if you have some lens that are on a extreme positive end. You know you can only change the base value but not the adjustable range of the AF fine tune for each lens in the custom menu. Hope you won't face such a desperate situation.

And aerodave is right, you just disable the debug mode after all those adjustments and it will be still effective.

kasv,

I guess if I send in they would do the same thing. So why not save the shipment and time and fine tune yourself to get the best results? It is quite simple and you can easily change them back if you screwed things up.

Tony


Last edited by fulcrumx29; 09-29-2009 at 07:22 PM.
09-29-2009, 07:12 PM   #9
Inactive Account




Join Date: Aug 2009
Location: Hawaii
Photos: Gallery
Posts: 117
Original Poster
Hi All,

I'd like to share a summary on what I encountered and learnt during the debug AF fine tune.

1. Philosophy

The debug fine tune ajust the basic state of each of your 11 AF sensors separately, which can cure the sensor allignment error, and then you can fine tune every lens with the regular AF adjustment in the custom menu.

2. Guide

Here is some guide to tune the basic state:
RiceHigh's Pentax Blog: UPDATED: New Method to Access the Debug Mode of Various Pentax DSLRs
RiceHigh's Pentax Blog: K-m Debug Mode Unleashed! (For AF Correction)

They were written by RiceHigh (this guy really helps this time) for K-m, but K-7 is similar that you just need to change the extension name of your file.

3. Problem and tips

I initially cannot enter the debug menu for hours even if I did copy the right file to the right place. The trick for my K-7 is that you have to keep the SD card door open to let the camera run the commands for the first time. The hack site noted that but not in an easy-to-understand way.

My command is
[OPEN_DEBUG_MENU]
then you can set the debug mode to be enabled. Or you can use
[DEBUG_MODE EN]
to enter the debug mode directly though I did not try that.

Another tip is the that change of AF adjustment value is relative. The indicater below will only tell you the amount that will be added to the value shown by the gauge above the tune line.

I really enjoyed the debug menu even if I may not really need it. It makes Pentax even more playable. Pls read all the instructions above and try it carefully!

Good luck on the game!
Tony

Last edited by fulcrumx29; 09-29-2009 at 07:26 PM.
09-29-2009, 09:21 PM   #10
Veteran Member
schmik's Avatar

Join Date: May 2008
Location: Sydney Aus
Photos: Gallery
Posts: 527
Thanks for that. Very helpful.

One of my AF lenses is at -10 and still a bit suspect. The other is at -4.
For clarification (and simplicity) you are saying that i can set it to -40um in debug and then individually the lenses can be set to 0 and -6. Right?

mike
09-30-2009, 03:43 AM   #11
Forum Member




Join Date: May 2008
Location: Czech Republic, Ostrava
Posts: 97
QuoteOriginally posted by pcarfan Quote
Tony, this is great. Does it still reatin the changes for each lens ?, or is it only for the whole camera. Also, like in the K10D, does it sya 'debug mode' on the LCD all the time?

Thanks.
Did you try to set AF correction to all lenses to -10 and then tune it for every lens you have? I had big FF with K-7, and setting value to -10 with FA 50 1.4 didn't help me. So I set -10 for all lenses and -7 for FA 50 1.4 and looks it works now ..
09-30-2009, 05:24 AM   #12
Veteran Member
RBellavance's Avatar

Join Date: Nov 2006
Location: Near Montréal, Canada
Photos: Gallery
Posts: 1,716
QuoteOriginally posted by kolouch Quote
Did you try to set AF correction to all lenses to -10 and then tune it for every lens you have? I had big FF with K-7, and setting value to -10 with FA 50 1.4 didn't help me. So I set -10 for all lenses and -7 for FA 50 1.4 and looks it works now ..
According to the manual ("memo" at the top of page 22), if you set a global adjustment (i.e. "Apply all"), it overrides any individual setting. I.e. they are not cumulative.
09-30-2009, 09:07 AM   #13
Veteran Member
heliphoto's Avatar

Join Date: May 2008
Location: Region 5
Photos: Gallery
Posts: 2,540
QuoteOriginally posted by RBellavance Quote
According to the manual ("memo" at the top of page 22), if you set a global adjustment (i.e. "Apply all"), it overrides any individual setting. I.e. they are not cumulative.
Yep - in my experience, "apply all" sets the default, and then you can still set "apply one" for an individual lens... hence I would say kolouch's 50mm is set at -7 right now (kolouch, check this in the exif of a recent photo with that lens - the tag is, "AF Adjustment " and I would guess yours will contain the value "-7" )
09-30-2009, 09:51 AM   #14
Veteran Member
RBellavance's Avatar

Join Date: Nov 2006
Location: Near Montréal, Canada
Photos: Gallery
Posts: 1,716
QuoteOriginally posted by heliphoto Quote
Yep - in my experience, "apply all" sets the default, and then you can still set "apply one" for an individual lens... hence I would say kolouch's 50mm is set at -7 right now
If that is the case, then it is contrary to what the manual says. Wouldn't be the first time...
09-30-2009, 12:42 PM   #15
Inactive Account




Join Date: Aug 2009
Location: Hawaii
Photos: Gallery
Posts: 117
Original Poster
Mike,

You are right. It will solve your problem as it did to mine. But the exact number may vary 1 or 2.

Good luck,
Tony
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, debug, dslr, k-7, mode, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Front focus and back focus K-5 allantois Pentax K-5 48 03-31-2012 09:21 PM
Trying to understand front focus/back focus thing 41ants Troubleshooting and Beginner Help 16 08-31-2010 08:42 AM
Front/back focus or focus shift? fulcrumx29 Pentax SLR Lens Discussion 0 08-17-2009 04:56 PM
Front focus/ back focus on Manual lens. Possible? WangJianWei Troubleshooting and Beginner Help 6 04-20-2009 07:50 PM
How to check Back Focus/Front Focus grishazzz Troubleshooting and Beginner Help 14 03-18-2009 11:35 AM



All times are GMT -7. The time now is 06:28 AM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top