Lens correction and Photo Ninja

Started Apr 14, 2013 | Questions thread
OP rswa New Member • Posts: 7
Re: Lens correction and Photo Ninja

Robgo2 wrote:

rswa wrote:

Robgo2 wrote:

tom60634 wrote:

rswa wrote:

I am quite impressed with the detail and color that Photo Ninja reveals, but I much prefer the automatic lens correction found in ACR or NX2. I know one can manually correct lens distortion in PN, but this is not always easy, especially if there are no clear horizontal lines in the picture. Is there some way of combining the strengths of these programs — e.g., having the lens correction from ACR or NX2 be read by PN?

I appreciate hearing any suggestions since I don't want to have to choose between an easy rendering of detail and an easy rendering of geometry.

When developing your raw file in ACR turn off any automatic edits that you believe Photo Ninja performs better. Use ACR to perform the edits that it does best.

Open your file in Photoshop normally, then acceess the Photo Ninja plugin. You can now adjust the file  with parts of the plugin where Photo Ninja is superior i.e. noise reduction, sharpening in conjunction with noise reduction etc. etc.. When finished Photo Ninja will return the file to Photoshop with its edits applied or you can choose to return it to its original condition.

The problem with this workflow, as I understand it, is that you are using the inferior program, ACR, as the raw convertor and, thus, are sacrificing one of the great advantages of Photo Ninja.  A better solution is to create your own custom lens correction filters using the tool in PN's Distortion module.  It is very straightforward and easy to do.  All you have to do is find a suitable building to use as your subject.  I have done this for all of my Pentax lenses as well as my RX1.  The results are excellent.  Why not use PN as it was intended to be used?

Ultimately, Photo Ninja will offer a profile sharing feature, but for now, the distortion correction tool is your best option.


Thank you for your suggestions.

I agree that using ACR and then PN means that you are using PN as a filter plugin rather than as a format plugin, and so you are losing the benefit of PN’s impressive demosaicing algorithm.

Isn’t there a problem with creating lens profiles for zoom lenses? The amount of correction needed can vary non-linearly with focal length, with the wide-angle end requiring the most. This would mean creating a great many different profiles for the same zoom lens -- different profiles for different focal lengths. If the picture you took wasn’t at the focal length of one of your profiles, then you would have to roughly interpolate between two profiles. I was hoping for something simpler and easier, but perhaps that is the best one can do with PN for now.

Photo Ninja's tutorials provide specific guidance for creating correction profiles for zoom lenses.  The software knows how to handle it.  It's no different than with ACR or PTLens profiles.  You can find the tutorials under the "?" in the Distortion module.  Just follow the links.


The tutorial acknowledges that for each zoom lens, you will need to create "a few dozen training samples." No such effort is needed for ACR or NX2. I guess I am just lazier than you: I was asking for something as easy & automatic.

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