Photographer's Friend

DoF, Focus Stacking, ND & More

$9.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.

New Focus Stacking Calculator! See how many shots you need and where to focus for each one, then step through your stack on iPhone, iPad, or Apple Watch. Photographer's Friend has four excellent photography calculators in one application, and three of them are also available for Apple Watch! We believe our Depth of Field Calculator with Pixel Peeper mode turned on is the most accurate and detailed DoF Calculator available! Depth-of-Field Calculator ~~~~~~~~~~~~~~~~~~~ Calculate the Depth of Field in your photographs based on your camera's sensor size, aperture, focal length, and focus distance, set with four dials along the base of the DoF Calc. The display includes your Hyperfocal Distance, which can be temporarily transferred to the Focus Distance dial or locked for continuous updates. Display distances in metric units or feet and inches. By default, we use traditional Depth of Field calculations, but Pixel Peeper mode uses your sensor size and megapixels for higher accuracy. You can also enter a custom Circle of Confusion size. Diffraction Limit guides change the color of the Aperture dial when diffraction becomes possible, and the Pro Add-on lets you adjust where they start. Focus Stacking Calculator ~~~~~~~~~~~~~~~~~~~~~ When one frame can't hold everything you want sharp, focus stacking can. Set your aperture, focal length, and the nearest and farthest points you want in focus, and the Focus Stacking Calculator tells you how many images you need, where sharp focus starts and ends, and the focus distance and depth of each step. Step through your stack shot by shot, add overlap between steps for extra safety, and set or lock the far focus to your Hyperfocal Distance. On Apple Watch, simply turn the Digital Crown to move to the next shot. Pixel Peeper mode and Circle of Confusion settings are shared with the DoF Calculator. Neutral Density Filter Calculator ~~~~~~~~~~~~~~~~~~~~~~~~ Enter your base shutter speed to calculate your new shutter speed after fitting ND filters to your lens. Filter labels include the multiplication factor (ND2, ND4, etc.) with f-stop and optical density values. Hide filters that you don't use, or bring them back, with slide gestures. A timer is available for shutter speeds of 3 seconds or longer, so if your camera doesn't have a built-in timer, we'll time your exposure for you! Exposure Shift Calculator ~~~~~~~~~~~~~~~~~~~ When you adjust your aperture from f/5.6 to f/11, does your shutter speed need to go up or down? How does it affect your ISO? The Exposure Shift Calculator has the answers! Enter your current settings with the Aperture, Shutter Speed, and ISO dials, and see how changes to one dial affect the others. Lock any dial to calculate the free dial automatically, or turn on Exposure Value Lock to have Photographer's Friend calculate all settings for you! Additional Features as In-App Purchases ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Photographer's Friend is fully functional at the marked price. Apple Watch Extensions and some Pro features are available as In-App Purchases, as they may not be of interest to everyone. There is also a bundle to save on the individual Add-ons. Links ~~~~ We've included links to in-depth articles on Hyperfocal Distance, Neutral Density Filters, Circle of Confusion, the Airy Disk and Diffraction, and Exposure Value, as well as online tutorial videos that walk you through each calculator and the Apple Watch Extensions. You can email us directly or use our web contact form to ask photography questions or send suggestions for the app. If you own a Neutral Density filter that is not listed, let us know, and we'll add it in a future update. Onboarding Help ~~~~~~~~~~~~~ All four calculators and some settings screens have onboarding help with interface element highlighting to help you get to know your new Photographer's Friend. Whether you are just getting started or a seasoned professional photographer or educator, we think you'll find Photographer's Friend invaluable!

  • 3.7
    out of 5
    6 Ratings

Focus Stacking now plans a seamless stack, with the last shot at Focus Far and true near and far limits. The ND timer is more reliable in the background and on Apple Watch, plus many fixes across the DoF and Exposure Shift calculators.

The developer, Martin Bailey Photography K.K., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Martin Bailey Photography K.K.
Size
69 MB
Category
Photo & Video
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
English and 15 more
  • English, Arabic, French, German, Hebrew, Hindi, Italian, Japanese, Korean, Malay, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
Age Rating
4+
In-App Purchases
Yes
  • Complete Pro Bundle $5.99
  • Photographer's Friend Pro! $2.99
  • Apple Watch Extensions $3.99
Copyright
© 2010 - 2026 Martin Bailey Photography K.K.