iPhone Screenshots


Photo Aide is a flexible and powerful photo calculator with a large photo equipment database:
- The ISO, aperture, shutters speed, focal length, and guide number values are adjustable in the range that your camera, lens, and flash support.
- It has a large database of DSLRs, lenses and flashes from all major manufacturers.
- It supports custom equipment — if your camera, lens, or flash is not in the database you can easily add it.
- It allows you to quickly adjust the parameters by using sliders.
- When one parameter is changed the others are updated instantly
- All modules support calculating any parameter from the others.

You can calculate:
- Depth of field and hyperfocal distance
- Aperture, distance, or focal length that give a certain depth of field
- Vertical, horizontal, and diagonal angle of view for a specific focal length and sensor size
- Focal length corresponding to an angle of view
- The recorded rectangle image size (field of view), for a focal length and subject distance
- Focal length or subject distance that provide a specific field of view
- Equivalent ISO, aperture and shutter speed combinations
- Flash subject distance for a combination of ISO, aperture, flash head zoom, and flash output power
- ISO, aperture, or flash output power that give a proper exposure for a specific subject distance
- Ability to save a preferred list of cameras, lenses, and flashes for fast access

Other features:
- Large database that has cameras, lenses, and flashes currently produced by all large manufacturers
- Supports custom cameras, lenses, and flashes — when you can’t find your gear in our database
- Supports both metric and imperial units
- Saving and retrieving ISO, aperture, and shutter speed combinations
- Comparing two exposure values: difference in stops, lighting ratio, and ND filter

What’s New

Version 2.3

Fixed a startup crash on iOS 8.4.
Updated the camera, lens, and flash database.

Ratings and Reviews

4.7 out of 5
6 Ratings

6 Ratings

Ma Hunkel ,

Great app, but...

Great idea and great execution. However, it doesn’t seem to allow me to adjust the power of my flash, s its calculations always assume full power (in real life, they can go down to 1/64). Also, I shoot lots of medium format (Mamiya rz67), and when I create profiles for those lenses, there is no option for sensor (film) size besides “other.” Because it’s a 6x7 camera, I’m not sure the calculations coming out of the app will work. I imagine any other medium and large format shooters out there would also love to have this app work for them. I, for one, would gladly pay for such features.
Still, definitely worth a download if you use any small formats.

Developer Response ,

The app allows the adjustment of the flash power, using the field “Output Power”. Set “Calculate” to “Output” to calculate the flash power as a function of aperture, ISO, and distance.

When adding a custom flash please set “Min Output Level” to the value that your flash supports. The minimum value that the app supports is 1/256.

The app will work for any sensor/film size. There are some presets defined for custom cameras, but those are only starting points. There is no assumption in the code that the sensor size is less than 24x36mm.

PhiloElectric ,

Bit of a Learning Curve, but works very well

This app provides a lot of useful info and one needs to “study” the app in order to quickly find what you need. That said, the data is well organized and accessible. Importantly, the ability to input, store, and recall information about specific cameras, lens, and flashes insures that accurate data is quickly available

Canino.luis ,

I use it for manual flash

This app is great! It calculates exposures and is spot on or very close when using manual flash. My speedlite was not listed but I had the manual and the zoom mm for each zoom as well as power settings Guide Numbers etc. This has gotten me in the ballpark if not spot on and I adjust from there on the fly. It has been an invaluable tool for me.


Daniel George Rusu
1.6 MB
Photo & Video

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2015 Dan Rusu


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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