# Focus Lt hyperfocal DOF — depth of field calculator

> Photography depth of field, hyperfocal distance, and blur simulation calculator. (iPhone/iPad app by Dmitry Zaika.)

- Source: https://appshunter.io/ios/app/focus-lt-hyperfocal-dof/id1155127972 (this page in markdown: same URL + `.md`)
- Developer: [Dmitry Zaika](https://appshunter.io/developer/1326165516)
- Category: Photo & Video, Utilities
- Price: Free
- Rating: 4.00/5 from 1 App Store ratings · 8 written reviews indexed
- Age rating: 17+
- Requires: iOS 9.3 · 8 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Russian, Chinese (Simplified, China), European Spanish
- Released: 2016-09-20
- Data updated: 2026-08-23
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/focus-lt-hyperfocal-dof/id1155127972/reviews.md

## What is Focus Lt hyperfocal DOF?

Consider bying new lens? Need to work the math for a perfect shot?

Use this depth of field and circle of confusion calculator to simulate the out of focus blur, depth of field and hyperfocal distance for different camera configurations, including the diffraction effect for small apertures. The blur values are measured in the pixels of the camera sensor. The blur simulation shows how much the infinity and the object will be blurred as seen on a 25 cm or 10 inch printout or screen.

You can tap on the magnifying glass to switch between full frame view, to asses the size of objects, and 1/10 of the frame view, where you can evaluate the blur.

The parameters are: *Distance* - distance to the object, *Lens type* - focal length, *F-number* - aperture setting, *Focus distance* - distance the lens is focused at, *Sensor* - the megapixel count of the matrix and the camera sensor size.

You can use the *HYPERFOCAL* mode to set the focus value to the hyperfocal distance for the current F value.

If you want to have both the object and the infinity in focus, use *AUTO HYPERFOCAL* mode, it will find the minimal F and the corresponding focus value. *AUTO HYPERFOCAL* will try to achieve the best possible result, but due to the diffraction effect of small apertures it's not always possible to get a sharp image, the simulation will reflect this.

The last smart function is *MAX BLUR FOCUS* - given an object distance and F-value it will suggest the closest focus value which will keep the object still in focus, while achieving maximum blur for the background. The idea is somewhat opposite of the hyperfocal shooting - here your focus point lies between the camera and the object with the depth of field ending on the object plane, ensuring the maximum possible blur for the background at your given F value. This works well if you are forced to use a relatively high F number, but there are no other objects in the view which are closer than the target.

The standard *circle of confusion* used for DoF, smart focus and max blur calculations is the sensor diagonal divided by *1730*, which is the so called Zeiss formula.

If you have any questions, suggestions or spotted an error, please don't hesitate to write to us: support@strelka.hk

## Key features

- Depth of field calculation
- Hyperfocal distance simulation
- Out-of-focus blur simulation
- Diffraction effect consideration
- Auto hyperfocal mode
- Max blur focus mode

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/focus-lt-hyperfocal-dof/id1155127972/reviews.md

### 5/5 — Из того что есть это 5

*2023-01-23*

Без рекламы - платная версия. Спасибо автору за то что можно попробовать его программу, спасибо за то что сделал нормальную программу, с визуальными примерами.Купил полную версию

### 1/5 — 垃圾软件广告多。

*2022-04-20*

垃圾一点都不好用，还有广告。

### 1/5 — Not usable

*2020-09-18*

The UI is just ok
But after only 1 min of usage, you get blown with a big ad covering the screen.
Junk.

### 1/5 — Реклама

*2019-01-29*

Для просмотра рекламы приложение, больше ничего полезного

### 1/5 — Nul

*2019-01-03*

App pourrie par la pub
N’est qu’une accroche pour la version payante
A fuir

### 1/5 — Ерунда!

*2018-09-15*

Нет 4/3! За 2 минуты,  рекламу посмотрел 2 раза!

### 1/5 — Вылетает приложение

*2017-06-13*

Вылетает приложение, даже нет возможности оценить функционал.

### 1/5 — Нет 4/3!

*2017-02-24*

Не смог использовать - нет матриц 4/3.

## Frequently asked questions about Focus Lt hyperfocal DOF

### What is Focus Lt hyperfocal DOF used for?

Focus Lt hyperfocal DOF is a tool for photographers to calculate depth of field, simulate out-of-focus blur, and determine hyperfocal distance for various camera and lens configurations.

### Does Focus Lt hyperfocal DOF consider diffraction?

Yes, the app simulates the diffraction effect, which is important for understanding image sharpness at small apertures.

### What camera parameters can I adjust in Focus Lt hyperfocal DOF?

You can adjust parameters such as distance to the object, focal length, F-number (aperture), focus distance, and sensor size/megapixel count.

### What is the difference between HYPERFOCAL and AUTO HYPERFOCAL modes?

HYPERFOCAL mode sets focus to the hyperfocal distance for a given F value. AUTO HYPERFOCAL mode finds the minimal F and corresponding focus value to keep both the object and infinity in focus.

### How does MAX BLUR FOCUS work in Focus Lt hyperfocal DOF?

MAX BLUR FOCUS suggests the closest focus value to an object that keeps the object in focus while maximizing background blur, useful when forced to use higher F-numbers.

### What is the standard circle of confusion used by Focus Lt hyperfocal DOF?

The app uses the Zeiss formula for its circle of confusion calculation, which is the sensor diagonal divided by 1730.

### Is Focus Lt hyperfocal DOF available on Android devices?

Based on the provided data, Focus Lt hyperfocal DOF is supported on iPhone and iPod devices.

### How often is Focus Lt hyperfocal DOF updated?

The app was last updated on January 9, 2018, with version 1.4. It was originally released on September 20, 2016.

## Version history (last 5 releases)

### 1.4 — 2018-01-09

This app has been updated by Apple to display the Apple Watch app icon.

Bugfixes

### 1.3 — 2017-07-07

Bugfixes

### 1.2 — 2016-09-27

Fixing a crash

### 1.1 — 2016-09-24

Fixing a crash

### 1.0 — 2016-09-20

No release notes.

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All apps by Dmitry Zaika: https://appshunter.io/developer/1326165516

## Related topics

[distance calculator hyperfocal](https://appshunter.io/ios/topics/distance-calculator-hyperfocal) · [dof hyperfocal](https://appshunter.io/ios/topics/dof-hyperfocal) · [depth of field hyperfocal dof](https://appshunter.io/ios/topics/depth-of-field-hyperfocal-dof) · [everfocus sidekick](https://appshunter.io/ios/topics/everfocus-sidekick)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*