Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-23-2011, 03:34 PM   #1
Veteran Member




Join Date: Jan 2007
Location: New Mexico
Photos: Albums
Posts: 1,125
AF microadjustments on third party lenses?

Is it possible for a K-7 to adjust for front and back focus on modern third party lenses?

Rob

02-23-2011, 04:37 PM   #2
Veteran Member
deejjjaaaa's Avatar

Join Date: May 2007
Location: steel city / rust belt
Posts: 2,046
QuoteOriginally posted by robgo2 Quote
Is it possible for a K-7 to adjust for front and back focus on modern third party lenses?

Rob
it was possible even for Pentax *istDL, rogbo2 - unless you are asking if K7 will remember the settings for different 3rd party lenses (distinguish between different non native lenses).
02-23-2011, 04:45 PM   #3
Veteran Member




Join Date: Mar 2010
Photos: Gallery | Albums
Posts: 1,545
Yes, I've done it multiple times with multiple third party lenses. It remembers the setting for next time too!
02-23-2011, 04:56 PM   #4
Pentaxian
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
There is a big but though, some third party lenses don't identify themselves accurately to a Pentax body. They only identify the manufacturer, I think Sigma does this and maybe Tamron. So that means adjustments apply for all sigma lenses. I think. I could be wrong though....

02-23-2011, 05:00 PM   #5
Veteran Member




Join Date: Mar 2010
Photos: Gallery | Albums
Posts: 1,545
QuoteOriginally posted by twitch Quote
There is a big but though, some third party lenses don't identify themselves accurately to a Pentax body. They only identify the manufacturer, I think Sigma does this and maybe Tamron. So that means adjustments apply for all sigma lenses. I think. I could be wrong though....
Doesn't do that to me. I own two Sigmas and it keeps track of both.
02-23-2011, 05:02 PM   #6
Pentaxian
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
QuoteOriginally posted by Ubuntu_user Quote
Doesn't do that to me. I own two Sigmas and it keeps track of both.
OK, maybe it applies to certain groups of Sigma Lenses though. When I use my Sigma 17-70, in Aperture it can't determine exactly which Sigma lens it is but offers 3 or 4 different Sigma lenses that it could be.
02-23-2011, 05:24 PM   #7
Veteran Member




Join Date: Mar 2010
Photos: Gallery | Albums
Posts: 1,545
Oh yeah, Aperture doesn't recognize any of my Sigma lenses either... Where do you get it to give offers of which lens it is?
02-23-2011, 05:28 PM   #8
Pentaxian
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
QuoteOriginally posted by Ubuntu_user Quote
Oh yeah, Aperture doesn't recognize any of my Sigma lenses either... Where do you get it to give offers of which lens it is?
In "Lens used" of whatever field in the EXIF, it lists a few possible Sigma lenses (none of which happen to be a 17-70 though LOL). I believe this identifier is what Pentax bodies have to go on and Sigma reuses the identifier for multiple lenses (something to do with not wanting to pay licencing costs for K mount and reverse engineering the standard instead????)

02-23-2011, 06:21 PM   #9
Veteran Member




Join Date: Mar 2010
Photos: Gallery | Albums
Posts: 1,545
QuoteOriginally posted by twitch Quote
In "Lens used" of whatever field in the EXIF, it lists a few possible Sigma lenses (none of which happen to be a 17-70 though LOL). I believe this identifier is what Pentax bodies have to go on and Sigma reuses the identifier for multiple lenses (something to do with not wanting to pay licencing costs for K mount and reverse engineering the standard instead????)
Ah interesting. I'll have to look at that...
02-23-2011, 06:38 PM   #10
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,243
QuoteOriginally posted by twitch Quote
In "Lens used" of whatever field in the EXIF, it lists a few possible Sigma lenses (none of which happen to be a 17-70 though LOL). I believe this identifier is what Pentax bodies have to go on and Sigma reuses the identifier for multiple lenses (something to do with not wanting to pay licencing costs for K mount and reverse engineering the standard instead????)
I think this is correct. I believe, for instance, that Sigma uses the same number for some 17-70 and 70-200 lenses, meaning if you would adjust one, you would adjust the other, even if it didn't need adjusting.
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!
k-mount, party, pentax lens, slr lens, third, third party
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dangerous third party lenses (PK-A/R)? MNCurt-K10D Pentax DSLR Discussion 13 07-30-2013 12:48 AM
3rd party lenses mercyreaper Pentax SLR Lens Discussion 7 02-03-2010 02:30 PM
Third Party Lenses NOT for Pentax JJJPhoto Pentax SLR Lens Discussion 6 08-03-2008 06:04 AM
question about third party lenses shadowrulz3164 Pentax SLR Lens Discussion 3 01-11-2007 08:44 AM
Third party lenses question... Duh_Vinci Pentax SLR Lens Discussion 8 11-30-2006 12:06 AM



All times are GMT -7. The time now is 12:29 PM. | See also: NikonForums.com, CanonForums.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