nikonians

Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.

| |

Sign up Login
Home Forums Articles Galleries News Workshops Shop Recommended
members
All members Wiki Contests Vouchers Apps Newsletter THE NIKONIAN™ Magazines Podcasts Fundraising
Go to a  "printer friendly" view of this message which allow an easy print Print Go to the page which allows you to send this topic link and a message to a friend Email this topic to a friend
Forums Lobby MASTER YOUR TOOLS Post-Processing & Workflow (Public) topic #67453
View in linear mode

Subject: "Distortion Correction Software" Previous topic | Next topic
mpage Silver Member  San Jose, US  Nikonian since 29th Jun 2004 Sun 09-Jun-13 01:11 PM
351 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
"Distortion Correction Software"
Mon 10-Jun-13 10:43 AM by mpage


When I moved from DX to FX, I needed to replace some of my lenses. When I got the a Nikon 17-35 f/2.8 that replaced the Nikon 17-55mm f/2.8 DX lens, I began to notice that there was some distortion that I could not easily fix in Photoshop. I ended up going with DxO Optics Pro, primarily for the ability to correct distortion.

I came across a Zeiss PDF document on distortion recently that is very informative. I thought that others might find it useful:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDgQFjAB&url=http%3A%2F%2Fwww.zeiss.com%2FC12567A8003B8B6F%2FEmbedTitelIntern%2FCLN_33_Distortion_EN%2F%24File%2FCLN33_Distortion_Article.pdf&ei=QnO0UfCmH8H6iwKg6ICoDQ&usg=AFQjCNGf0MGjFddCYbA_hD4SUn8nBRrdkg&bvm=bv.47534661,d.cGE&cad=rja

-Mark-

My Nikonians Gallery

  

Alert Print | Reply | Quote | Top

Replies to this topic
Subject Author Message Date ID
Reply message RE: Distortion Correction Software GiantTristan Silver Member
09th Jun 2013
1
Reply message RE: Distortion Correction Software mpage Silver Member
10th Jun 2013
2
     Reply message RE: Distortion Correction Software Wolphin Silver Member
08th Jul 2013
3
          Reply message RE: Distortion Correction Software mpage Silver Member
09th Jul 2013
4
Reply message RE: Distortion Correction Software Fovea Gold Member
14th Sep 2013
5

GiantTristan Silver Member  Stamford, US  Nikonian since 08th Jan 2006 Sun 09-Jun-13 02:49 PM
2026 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#1. "RE: Distortion Correction Software"
In response to Reply # 0



Excellent article. Thanks for the link.

Tristan

Visit my Nikonians gallery.

Visit my Nikonians gallery.

  

Alert Print | Reply | Quote | Top

    
mpage Silver Member  San Jose, US  Nikonian since 29th Jun 2004 Mon 10-Jun-13 02:35 AM
351 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#2. "RE: Distortion Correction Software"
In response to Reply # 1
Mon 10-Jun-13 03:46 AM by mpage


Tristan,

The article grabbed me right from preface:

“I found somebody say ‘terrible moustache distortion’, but I don’t see any distortion at all”.

As you can see in above statement in a forum discussion one can have very different opinions about distortion of lenses. For some photographers straight lines are of low importance or their subjects don’t have them. Others strive for perfection and spend a lot of efforts, to heal geometric aberrations at least in the image post-processing.

Those who try to avoid these efforts search for lenses which deliver perfect quality right from the beginning without later improvements. At this point the problem with numbers arises, because absolute perfection exists only in a few types. Most lenses exhibit at least small distortion errors, and to decide whether they are acceptable, one has to understand the numbers in data sheets and in lens test publications. This issue of Camera Lens News tries to support you a little bit in understanding this matter.


I spoke with a photographer from a local publication about the distortion and geometric problems with my images shot using the Nikon 17-35mm f/2.8 from at Kentucky Derby party and how pleased I was with the results from DxO Optics Pro. I had them on my iPad and showed him. To my astonishment he thought the images displaying distortion and awkward vertical lines were better. He apparently is among those photographers who "straight lines are of low importance."

I, on the other hand, tend to lean towards the other end of the spectrum, those who "strive for perfection and spend a lot of efforts, to heal geometric aberrations at least in the image post-processing."

I wonder where others fall on this spectrum?


-Mark-

My Nikonians Gallery

  

Alert Print | Reply | Quote | Top

        
Wolphin Silver Member  Calgary, CA  Nikonian since 04th Mar 2012 Mon 08-Jul-13 04:19 PM
93 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#3. "RE: Distortion Correction Software"
In response to Reply # 2



Mostly, I just do basic modification, but if I spend my than 5 minutes, it is an important shot!

When setting up to take a shot, I try to avoid having something that needs to be a straight line pass though the outer 1/3rd on the shot, or do so in a way it won't be noticed, which would minimize the distortion.

That said, I have had a time that I used a doorway to frame the shot, and the doorway appeared skinnier at the top! I did run it through an automated lens correction with fixed the shots acceptably, at which point I left it. I still could see some distortion, but only if I was looking for it.

I go by looking at the shot at a glance looks correct, then the distortion is "acceptable". I tend to use FX lenses on my DX bodies, so distortion negligible for the most part.

Visit my Nikonians gallery.

  

Alert Print | Reply | Quote | Top

            
mpage Silver Member  San Jose, US  Nikonian since 29th Jun 2004 Tue 09-Jul-13 02:01 AM
351 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#4. "RE: Distortion Correction Software"
In response to Reply # 3
Tue 09-Jul-13 04:02 AM by mpage


Adam,

The first time I used the Nikon 17-35mm f/2.8D lens, I noticed problems with geometry due, in part, to my sloppy shooting technique. Here is an example:



I used DxO to do the rough correction. It took me 20 or 30 seconds to make this correction. I could have done it in Photoshop, but it would have take me much longer. This was only a rough correction. From this point I can tweak the the image more in DxO or take it into Photoshop.

-Mark-

My Nikonians Gallery

Attachment #1, (jpg file)

  

Alert Print | Reply | Quote | Top

Fovea Gold Member  Colombo, LK  Nikonian since 26th Sep 2002 Sat 14-Sep-13 07:13 AM
3638 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#5. "RE: Distortion Correction Software"
In response to Reply # 0



Thanks for the link/article

Lightroom 5, btw does a great job at correcting distortions!

Regards
Dinil




Struck by Light - Blog & Gallery
Visible Range - Photography & Beyond

  

Alert Print | Reply | Quote | Top

Forums Lobby MASTER YOUR TOOLS Post-Processing & Workflow (Public) topic #67453 Previous topic | Next topic