support.bibblelabs.com Forum Index support.bibblelabs.com
Forums for Bibble
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

These forums are READ-ONLY.
The current forums for Bibble 5 discussions and support is at http://support.bibblelabs.com
nikkor 18 135

 
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    support.bibblelabs.com Forum Index -> Lens Distortion Correction
View previous topic :: View next topic  
Author Message
teloot



Joined: 17 Jul 2007
Posts: 6
PostPosted: Sun Jul 22, 2007 8:17 am    Post subject: nikkor 18 135 Reply with quote
Hello
I'm looking for the corrections for this lense, usually sold with the d80 in europe.
I've been trying to shoot the required pictures but unfortunately I didn't receive any answer from bibble for the time.
I guess my pictures were not enough "accurate" for the calibration.
Does anybody have the corrections for this lense ?

Thank you.
Back to top
View user's profile Send private message
jeff
Site Admin


Joined: 25 Apr 2005
Posts: 1039
Location: Austin, Tx
PostPosted: Mon Jul 23, 2007 12:55 pm    Post subject: Reply with quote
teloot,

I've been out of the office for a bit, and just returned today. On first look - I think most of your images will be usable. Give me a day or two to start the actual calibration, and I'll PM you if I need a specific focal length reshot...

Thanks, Jeff
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
jeff
Site Admin


Joined: 25 Apr 2005
Posts: 1039
Location: Austin, Tx
PostPosted: Wed Aug 01, 2007 9:41 am    Post subject: Reply with quote
Here are the correction parameters for this lens. I'm not 100% happy with the corrections around 32mm to 48mm range. I'd love to see additional calibration samples in this zoom range with this lens (with correction turned off)

Code:
begin lens
group: nikonSLR
multiplier: 1.5
menu_lens: Nikkor 18-135
cal_abc:  18    0.010516 -0.033415  0.000000
cal_abc:  20    0.013430 -0.028560  0.000000
cal_abc:  28    0.010740 -0.007090  0.000000
cal_abc:  32    0.000000  0.013840  0.002600
cal_abc:  40    0.000000  0.022370 -0.026420
cal_abc:  48    0.000000 -0.006420  0.019040
cal_abc:  58    0.000000  0.023710 -0.031210
cal_abc:  85    0.000000  0.010900 -0.007660
cal_abc: 105    0.000000 -0.000450  0.013550
cal_abc: 135    0.000000  0.027500 -0.043800
end


I'm going to hold off adding this to the calibration data that ships with Bibble until I can hone in on better numbers in that middle zoom range. But distortion in that range isn't too severe, and the numbers above work well in the very long and short end of the zoom ranges.

--Thanks, Jeff
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Display posts from previous:   
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    support.bibblelabs.com Forum Index -> Lens Distortion Correction All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group