FocusFinder

Calculate your depth of field, in the field.

Customize to your liking with presets, precision modes and support for every camera on the market.

Calculate the field of view for your camera settings.

Download on the App Store

What our users say

I've tried a few of these, but was always disappointed because particularly for macro/close-ups, they failed. This one is very different. Great functionality, intuitive interface and, most importantly, the app elegantly changes the scale units from e.g. metres to centimetres as distance to object and DoF decrease.

Ich benutze die App sehr oft, um bei schwierigen Einstellungen die Tiefenschärfe abzuschätzen. Sie ermöglicht mir schon vor dem Dreh Prime, Blende und Lichtbedarf aufeinander abzustimmen, um mit der Tiefenschärfe den gewünschten Fokus und Aussage einzufangen.


Features

Visualization

FocusFinder calculates the near and far end and the length of the sharp range, as well as the hyperfocal distance, and visualizes them for you.

Additionally, it calculates how blurry objects at certain distances will become, and shows you the size of the blur circles.

Intuitive, fast Controls

Input is quick and easy, with perfect controls for every value.

Use the sliders, tap the side-buttons for a quick +/- 1m, or use manual entry — it's up to you.

Background Images

Our beautiful background images allow you to immediately get a feeling for the different distance ranges. This helps you develop an intuition for the depth of field right away.

Calculation of anything you need

Depth of Field

Near and Far Distance

Hyperfocal Distance

Field of View

Included Database

FocusFinder includes a huge database of modern cameras, which we update constantly. If your camera is not yet included please drop us a hint, and we will add it within a business day.

Camera Quick-Switcher

Choose any cameras as favorites to switch quickly between them.

Presets

Presets allow you to save settings you use often. You can activate them with a single tap.

Precision modes

If you crop your images after taking them, other depth-of-field-calculators give non-sensical answers. FocusFinder includes three precision modes that allow you to tailor your results to your use case: standard, high-definition (for light crops) or pixel-perfect.


FAQ

Basics & Graphics

What is the △/depth of field?

Depth of field is the distance around the distance your camera is focused where objects appear acceptably sharp in an image.

E.g., in the image above, the depth of field is around half a centimeter - the wasp is fully sharp, but everything behind or in front of it is blurred.

FocusFinder shows your depth of field with a delta in front of it.

What are the near and far distances?

These are the distances from your camera where the depth of field begins and ends. E.g., every objects that is at least the "near" distance away from the camera and at most the "far" distance away appears sharp.

What is the hyperfocal distance?

In landscape shots ("landscape" as in "nature", not as in "landscape mode") you often see an infinite depth of field - everything after a certain distance will appear focused. You can achieve this by setting your camera's focus to the hyperfocal distance that's calculated by FocusFinder.

Controls

How can I make precise inputs?

If you want to set an exact value for those values, you can use one of several methods:

First, you can drag your finger down while setting a value on the slider, like in the videos-app. This will increase the precision of the slider.

Second, you can use the buttons directly left or right of the slider to make quick +/- adjustments. This will smartly switch to the next unit, e.g. from 3.6 to 3.7m or from 400 to 410m.

The distance can also be set manually by tapping the keypad-button next to "distance", and then inputting your desired value.

What is the distance-slider for?

You can use the distance slider to set the distance that your lens is focused to, in order to calculate the area of the image that will be in focus. If you usually set your lens to the hyperfocal distance, you can use FocusFinder's Hyperfocal Mode, which will disable the distance slider and use the calculated hyperfocal distance instead.

How do presets work?

To add a preset, input the settings you would like to save and tap the plus button right next to the presets. Tapping on the preset will then set your controls to this values again.

To change or delete a preset you can long-press on the preset, and choose from changing or deleting it.

More

Does FocusFinder support my camera?

Yes.

FocusFinder has a huge included database that is updated constantly. If your camera is not supported yet, please mail us here (or use the feedback form inside the app), and we will add it.

Will you add feature x?

We might. Tell us your ideas with the contact form inside the app or via mail, and we will see if we can help you.

Are the calculations accurate?

Yes. We have tested the calculations throughroughly. FocusFinder might, however, give slightly different results for some cameras compared to older approximative formulae. This is because FocusFinder calculates the maximum Circle Of Confusion for your camera's sensor, instead of using a generic estimate (like 0.03 for full-frame-cameras). This results in more accurate results for your camera. If you prefer a circle of confusion of 0.03, use the supplied "Generic Full-Frame"-camera from the database.

That being said, if you do discover inaccurate calculations, please tell us with the feedback form, and we will be glad to help you.


Privacy Policy

We value your privacy. We do not collect your data, with two simple exceptions:

  1. If you write us a mail to our mail adress or via the built-in feedback form, we will use your e-mail-adress and the contents of your mail to answer your request. We won't use this data for anything else.
  2. If you opt in, Apple might collect anonymized information e.g. about how often you start our App and potential crashes. We can't trace this information back to individual users.

Support

If you have any questions, problems, or want to give us feedback, you can reach us at focusfinderapp@gmail.com. We are happy to help you!