Photographer's Friend DoF and ND Calculators

Introducing Photographer’s Friend for iPhone and iPad (Podcast 592)

It gives me great pleasure to tell you that I have now released the update to our iPhone app, Photographer's Friend. We now support iPad in addition to iPhone and iPod touch, as well as landscape and portrait orientations. As I mentioned in an update a few weeks ago, from...

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Martin Bailey
Martin Bailey is a nature and wildlife photographer and educator based in Tokyo. He's a pioneering Podcaster and blogger, and an X-Rite Coloratti member.
  • Mark
    Posted at 21:45h, 09 October Reply

    It looks awesome. My biggest problem using these types of apps are my ability to judge the distance of the subject I’m shooting. How can I be exact in knowing the distance of my subject?

    • Martin Bailey
      Posted at 21:59h, 09 October Reply

      Thanks Mark!

      Some lenses have the feet and meters scale in a little window, which can be very helpful, but if that’s not available a guestimate is really all that’s necessary. I just guess roughly how far my main subject is, or when using Hyperfocal Distance, just guess approximate how far out that point will be.

      I find my DoF calc more useful for understanding approximately how much depth of field I’m going to get, rather than looking for exact distances and depth.

      Of course, for closer distances, you can measure from the sensor, but I have rarely done that. Again, these numbers are more a guide for aligning the thought process than anything else.

      I hope that helps some.


      • Mark casebeer
        Posted at 23:02h, 09 October Reply

        Thanks Martin for the reply. I redoaded the app and I must say it’s impressive. It can really help you learn more about shooting and learning what is the DOF using any lens and apature. I’ve been playing with it and thinking how this is going to help with my photography. I must say also THANK YOU for the free upgrade. You must be very proud of the new app.


        • Martin Bailey
          Posted at 10:20h, 10 October Reply

          That’s great Mark. Thanks for giving it a try, and for the kind words. I hope you continue to find Photographer’s Friend useful.

          I intend to enhance it and add more features over time, so please stay tuned for that too.


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