OptimumCS-Pro is the unique Optimum Camera Settings tool for imaging professionals — for photographers, cinematographers and videographers. As a professional, you spend a fortune on quality optics — OptimumCS-Pro helps you use that expensive gear to its full potential.

In all imaging work where you require the sharpest possible image across a depth range, OptimumCS-Pro is far superior to any depth of field calculator. You know that stopping down decreases image blur caused by defocus, but you also know that, on the other hand, it increases blur caused by diffraction. So you don't want to stop down too far. What, then, is the optimum aperture? And what is the optimum focus distance? OptimumCS-Pro is designed to answer precisely those questions.

And it alone gets the workflow right:
• Decide what are the nearest and furthest objects in your scene that need to be sharp.
• Set their distances in OptimumCS-Pro, and set the focal length of your lens.
• The app instantly displays the focus distance and aperture that minimise the combined effects of defocus blur and diffraction, for the sharpest image across the desired depth that the laws of physics will allow (and therefore, in all cases, sharper than what is achieved via traditional practice).

It couldn't be any easier, simpler and faster!

OptimumCS-Pro displays image sharpness information, so you'll know if your shot will be sharp enough to meet your needs. Also included is data on shooting at other than optimal settings. Can’t shoot at the optimum aperture, because, for example, you need a faster shutter speed afforded by a wider aperture? You’ll know exactly what the effect of your decisions will be.

OptimumCS-Pro's instant results are perfect for creative professionals who don’t want their tools to get in the way of their work or their art.

A few words on the "pro" version:

OptimumCS-Pro retains the elegant, uncluttered look of OptimumCS, adds expanded functionality and adds options to configure functionality to better meet individual needs:
• User-definable focal length presets allow lightning-fast focal length selection.
• Numerical readouts for optimum focus distance and aperture complement the analog scales.
• The optimum aperture snaps to your choice of the nearest 1/3 stop or the nearest 1/2 stop.
• The aperture scale shows 1/3 stop or 1/2 stop markers (user selectable).
• The aperture scale can be set to display apertures to f/22 or f/64.
• Several different distance scales, emphasising near or far distances, are available, as is one for use with Hansma’s focus shift method in large format photography.
• An optional "distance snap" function makes the distance slider even easier to use.
• The facility to set wavelength is available for those working in the infrared or ultraviolet part of the spectrum.
• The wavelength selection button gives a visual indication of the spectral range in which you are working (visible, IR or UV).
• A marker can be placed on the blur spot diameter scale as a reminder of what you consider acceptable blur sizes.

For further information on the right tool for the job, check out "Best Practice in Working With Depth of Field" at

What's New

Version 5.2

Support for iPhone X

Customer Reviews

Eye Opening App for Photographers


This app is great for teaching purposes, as well as out in the field. The fact that it approaches the task of setting the aperture from the photographer's point of view - give it the near/far distance and it gives you the aperture helps my students quickly achieve better quality images. Additionally they visually see the affects of changing positions of the subject and how that impacts the best aperture. Interestingly all the calculations (if you read the provided information) show that lens manufacturers should simply make lenses with aperture ranges around the "sweet spot" and forego those narrower apertures. This eye-opening app should be on every photography instructor's list of equipment for class.

A course in exposure, DOF and focus


I was about to create this app myself and found this wonder. Study this and associated articles on the web and your shot quality will have a step function in improvement. My best LF work happened when I began working in the image space.

Every photographer, particularly landscape shooters, should own this app.

Not terribly useful.


The description of this app sounds promising, but for landscape photographers who want a deep depth of field it really does not tell you what you don't already know. Additionally, it has an arrow of where you should focus but it does not tell you what that number is, it simply just had an arrow between 10-15 feet. Not very precise when that is kind of the point of this app. If I had to do it over again I would not purchase.


George Douvos
12.6 MB
Photo & Video
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 George Douvos


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

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