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About Martin Bailey
Martin Bailey is a nature and wildlife photographer based in Tokyo. He's a pioneering Podcaster and blogger, Capture One Brand Ambassador and X-Rite Coloratti member.
Fueled by his passion for nature and travel, and a tireless desire to share his knowledge and artistic vision, Martin is a popular international tour and workshop leader, helping photographers from around the world to experience and capture the wonders of this awesome planet we call home.
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Tour Leader• Capture One Ambassador
X-Rite Coloratti • Fine Art Printer
Tour Leader• Capture One Ambassador
X-Rite Coloratti • Fine Art Printer
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The calculator then instantly displays your depth of field including the near limit, far limit, and hyperfocal-distance. If you tap the Hyperfocal-Distance label the focus distance dial is automatically set to the hyperfocal-distance and all displayed information is updated. Tap again and your initially selected focus distance is restored.
Tap the [Focus ft/m] button to toggle between feet and meters. To make this interaction easy to remember, the labels that have a function are blue.
We didn’t have to go this far but thought it was fun to provide apertures down to f/0.7 because there are actual lenses that go that wide, although very rare. You can also increase focal length and/or decrease focus distance to the point that your depth of field is as shallow as 0.1mm, and then we switch to µm (micrometers or micron) and continue to calculate down to single digit µm. That’s 0.0001 cm. Talk about razor thin depth of field! Crazy, but fun to play with, and you never know, you might need this one day.
In Pixel Peeper Mode we recalculate your actual Depth of Field based on your camera's sensor size and megapixels, from which we calculate the Pixel Pitch, Airy Disk size, and Circle of Confusion size.
Note that the Diffraction Warnings are intended as a guide, to show you when there is a possibility of diffraction. We recommend that you test your own lenses and if necessary, you can calibrate the warnings by using a different megapixel count or Custom CoC so that the red warning kicks-in in line with your findings.
Enter your current camera settings with the Aperture, Shutter Speed and ISO dials, and watch Photographer’s Friend calculate how changes to one dial affect the others. You can lock any of the three dials to calculate just the other free dial automatically, or turn on Exposure Value Lock to have Photographer’s Friend calculator all settings for you!
The Exposure Value display and lock is invaluable when looking for appropriate settings from a light meter EV readout. We’ve also added a button to send your aperture to the Depth of Field Calculator and another to forward your shutter speed to the Neutral Density Filter Calculator.
The huge range of apertures and ISOs are great for educational purposes. We also included a settings screen to set the upper and lower limits of each dial to match your camera.
A timer is available for shutter speeds of 5 seconds or more. If you get a phone call or need to use another app during a long count-down, just background the app, and it will update when you open it again.
When you first set a timer, we’ll ask for permission for Photographer’s Friend to use Notification Center on your iOS device and we’ll display an alert when the timer finishes.
You’ll ever need this in real life, but the ND Calculator allows stacking of filters for up to 30-year exposures. This is great for understanding how neutral density filters affect the shutter speed and for teaching others when necessary.
To hide filters that you don’t use just slide them to the left. Once filters are hidden, the button below the Shutter Speed dial displays how many filters are hidden. Tap this button to display the hidden filters with a dark background, and slide them to left again to unhide them if necessary. When you finish unhiding filters, click the red button to exit unhide mode.
There are multi-page help sections with detailed information to help you understand the Depth of Field calculator, the Neutral Density calculator, and the Exposure Shift Calculator. Just swipe through the pages and tap Done to return to the Help tab. Along with the linked articles, you’ll fully understand these topics in no time.
There’s also a link to our Photographer’s Friend Video Tutorials page, with a video to explain how each calculator works.
It runs great on iPhones and iPads of all sizes. It also supports split view on iPads that support it, so you can shrink the app down to various sizes and view other apps at the same time!
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Includes the beautiful Japanese Red-Crowned Cranes, magestic Steller's Sea Eagle and White-Tailed Eagles, Whooper Swans, Northern Red Fox and Ural Owls, among other subjects.
In this portfolio you'll find jaw-dropping landscapes, beautiful and rugged people, and majestic wildlife.
There is also a video section with slideshows and a few short movies.