I'm searching a simple and cost-less way to remove the fisheye effect by:

  1. adding a material (additional corrective lens) or
  2. find the right software (free if possible) to remove the fisheye effect on my pictures
  • This question is not a duplicated one, I'm not only searching for a software solution. I'm also searching for an hardware solution that will avoid me to batch-process all of my images – PEC Feb 16 '15 at 8:07

I doubt there's a hardware solution to this, and if there were one, it's likely to cause a decrease in image quality. Software is your solution, here.

From the DJI website for the Phantom 2 Vision minidrone:

A lens profile released by Adobe for DJI Phantom 2 Vision's camera can be used to remove lens distortion

DJI keeps it here: http://download.dji-innovations.com/downloads/phantom-2-vision/en/PHANTOM_VISION_FC200_Files_and_Instruction_en.zip

This would require that you use post-processing software that understands adobe lens profiles (e.g., Lightroom), but that would probably be the fastest, easiest way to batch-process a number of photos to remove the distortion of the lens, particularly if you're shooting in DNG.

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