# DOF Slider: Focus Calculator — Depth of Field & Hyperfocal

> Depth of field calculator for photographers with extensive camera and lens support. (iPhone/iPad app by Mihai alexandru Bold.)

- Source: https://appshunter.io/ios/app/dof-slider-focus-calculator/id654949121 (this page in markdown: same URL + `.md`)
- Developer: [Mihai alexandru Bold](https://appshunter.io/developer/863433362)
- Category: Photo & Video
- Price: Free with in-app purchases
- Rating: 3.70/5 from 23 App Store ratings · 53 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 30 MB
- Languages: American English
- Released: 2013-10-23
- Data updated: 2026-10-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/dof-slider-focus-calculator/id654949121/reviews.md

## What is DOF Slider?

Calculate depth of field before you take the shot. Choose your camera, then adjust subject distance, aperture and focal length with three horizontal sliders. See your focus limits update as you move.

SEE WHAT STAYS SHARP
A live scene shows your settings at work. Flowers, a dog, a house and distant mountains sit at real distances, and each blurs according to your focus distance, aperture and lens. Open up the aperture and watch the background melt; zoom in and the scene tightens. You can turn the scene's animation off in Settings.

MADE FOR IPHONE DUO
Stand it up and the results face you while the sliders lie flat under your thumbs. Open it like a book and results and controls each get their own half, clear of the fold. Close it and everything moves to the outer screen, with your controls in the side bar. Layouts move smoothly as you fold.

READ YOUR FOCUS RANGE
See the near and far focus limits, total depth of field, and the distance in front of and behind your subject. Check hyperfocal distance when planning a landscape or a scene with distant detail.

CHOOSE YOUR CAMERA
Browse profiles for modern digital cameras, vintage cameras and film formats. Each profile supplies the circle of confusion used in the calculation.

ADJUST WITH ONE HAND
Keep settings and results on one screen. Work in metres or feet and inches, with optional aperture snapping and haptic feedback.

START WITH THE INCLUDED PROFILES
DOF Slider includes free camera profiles and standard calculation ranges. Additional camera packs and macro, telephoto and extended distance ranges are optional one-time in-app purchases. Restore existing purchases from Settings.

No ads. No subscription. No sign-in required. Calculations work offline with the available camera catalog; catalog updates and purchases need an internet connection.

## Key features

- Extensive camera model selection
- Adjustable distance, aperture, and lens sliders
- Instant depth of field calculations
- Metric and imperial unit support
- Wide aperture and focal length range
- Customization via in-app purchases

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Kill the ads | $0.99 | one-time |
| Canon 5D series | $0.99 | one-time |
| Canon 6D series | $0.99 | one-time |
| Fujifilm X1 series | $0.99 | one-time |
| Fujifilm XT series | $1.99 | one-time |
| Leica M series | $1.99 | one-time |
| Nikon D700 pack | $1.99 | one-time |
| Nikon D800 series | $1.99 | one-time |
| Sony A7 series | $1.99 | one-time |
| Canon EOS R | $2.99 | one-time |
| Nikon Z Pack | $2.99 | one-time |
| Macro Distances | $0.99 | one-time |
| Nikon D7000 series | $1.99 | one-time |


## Is DOF Slider safe?

Not enough ratings yet to assess DOF Slider.

## Is DOF Slider legit?

DOF Slider: Focus Calculator appears to be a legitimate app. The AppsHunter Legitimacy Score for DOF Slider is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (10 of 53)

All indexed reviews: https://appshunter.io/ios/app/dof-slider-focus-calculator/id654949121/reviews.md

### 3/5 — Readings unofficial for NIKON D780

*2026-07-31*

The only settings available are for the NIKON D750 and the NIKON D 700. My camera NIKON D780 is not available. I tried to set in for NIKON D7 50 but they are in effect not very accurate. But I must say at least sometime I can vary the differences for usability.

### 5/5 — Clean, efficient, complete

*2026-07-30*

I don’t get why this isn’t better rated, although the brutal ads may be part of it. I discarded it at first because they were so frequent, it seemed like a spammy junk app. After trying all the other DOF apps I reluctantly came back to this one and for some reason got way fewer ads so I could actually test it out.

Wow, what a great interface! Clean, clear, simple. Easy to read big numbers and one-handed operation. Actual 1/3-stop adjustments for aperture, not just a decimal number you have to fiddle with to get right. a usable focus range, that reads out in sensible units. All the info you need and none that you don’t.

This is the one you’re looking for.

### 1/5 — Unusable

*2026-03-09*

Due to the ad logic on the free version it’s unusable.

### 1/5 — Junk now

*2025-12-22*

…Plus the intrusive ads

### 1/5 — Did not have my camera, still charged money

*2024-04-07*

Waste of time

### 5/5 — Great app

*2022-09-15*

It works very well. Easy to use!

### 2/5 — Good but missing latest Sony Camera

*2022-09-12*

Good easy to use app on my iPhone.  However, disappointed to see that the latest Sony a7 iv model is not available… and I already paid the extra $1.99 for the Sony cameras.  To note, the Sony a7 iv started selling in October 2021, so it’s been almost a year!!!
Hope you can add this model soon!  Please!

### 1/5 — This app has two main issues

*2022-03-02*

Hello app makers!

This app has two main issues:

1. Too much data sharing. I value privacy a lot, and there's no reason an app should be entitled to my data. What I do on my phone is 100% my business, not anyone else's. There should absolutely no background non-consensual data sharing within the app. Having it listed on the app's download page is not consent, since it's treated as "normal," and it does not ask confirmation.

2. Hundreds of out in the open purchase buttons within the app. This is just a bad user experience. Do you really think anyone wants to scroll past hundreds of purchase buttons while using an app? Not only is it cluttered, it also makes it more likely that someone would make an accidental purchase that they didn't mean to. That is the last thing a person should have to worry about in an app. When I download an app, the transaction between you and me is over. If you want money, ask for it up front. Don't hide it within the app. If you don't ask for it up front, I will never purchase anything within the app.

Apologies for the strongly worded message. I have seen so much of this online, I have lost patience for it.

### 1/5 — This app pastes from your clipboard

*2021-11-20*

Why does this app paste from the clipboard as soon as you open it up? It should be a simple depth of field calculator with sliders and numbers. It doesn’t even have a text field for text entry. 

Perhaps it’s innocuous or accidental or maybe related to ads. But still not cool.

### 1/5 — Save your time

*2021-05-02*

Technically it’s not a scam, but it’s close enough that I’m rounding up.I downloaded this, found my camera (Sony full-frame), the app said I had to pay, so now I’m rating & deleting it and using a different app. Not worth my 2 minutes.

## Frequently asked questions about DOF Slider

### What does the DOF Slider app do?

The DOF Slider app is a depth of field calculator for photographers. It allows you to select your camera, distance, aperture, and lens using intuitive sliders to instantly determine the settings for your perfect shot. It helps you visualize and achieve the desired focus range for your photographs.

### What are the key features of DOF Slider?

Key features include an extensive list of modern and vintage cameras, adjustable sliders for distance, aperture, and lens focal length, instant depth of field calculations, support for both metric and imperial units, and a wide range of aperture settings from f/0.5 to f/64. It also offers customization options through in-app purchases.

### How much does DOF Slider cost?

The app is free to download and use, but offers in-app purchases for additional customization options. These purchases can extend the distance slider for macro or telephoto shots and allow you to purchase specific camera series. All purchases are for a limited time at the lowest possible price.

### What cameras and formats are supported?

The app supports hundreds of camera models from major brands like Sony, Nikon, Canon, Fujifilm, and Leica, as well as larger film formats such as 35mm, 6x4.5, 6x6, 4x5, and cinematographic formats like 16mm and 35mm. It also includes a full list of Circle of Confusion values.

### Can I use this app for macro photography?

Yes, you can use this app for macro photography. In-app purchases are available to extend the distance slider specifically for macro, telephoto, and superzoom distances, allowing for precise calculations even at very close focusing distances.

## Version history (last 5 releases)

### 2.8.0 — 2026-10-20

Made for iPhone Duo, and a whole new look.

• iPhone Duo: stand it up and the results face you while the sliders lie flat; open it like a book and each half gets its own column; fold it closed and your controls move to the side bar. Layouts glide as you fold, and a little aperture iris opens with the hinge.
• A live scene shows what stays sharp. Change focus, aperture or lens and the landscape blurs to match, with a very good French bulldog as your subject. Turn its animation off in Settings if you prefer.
• A redesigned calculator: a big depth of field readout, near, focus and far limits at a glance, and numbers that roll as you drag.
• Camera, settings and search now live in the navigation bar, with a new camera search.
• Resizable windows on iPad and fixes throughout.

### 2.7.2 — 2026-09-11

More cameras, easier browsing.

• 55 new camera profiles across 12 optional packs, covering Canon, Nikon, Sony, Fujifilm, LUMIX, Blackmagic, ARRI, RED and DJI.
• Includes Fujifilm X100VI and separate still-photo and video sensor profiles for DJI Zenmuse X7 and P1.
• Search stays visible while you scroll through camera results.
• Improved title spacing in settings and camera search.

Your existing camera purchases remain available.

### 2.7.1 — 2026-09-08

Updated purchase management and restoration for camera packs and measurement features. Existing purchases remain supported.

### 2.7.0 — 2026-09-05

All ads have been removed. Camera and calculation-range purchases remain available, and existing purchases can be restored. Updated support and privacy links.

### 2.5.0 — 2025-12-12

Modernized interface with improved navigation. Bug fixes and performance improvements.

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## More apps by Mihai alexandru Bold

- [Notchless - Wallpapers](https://appshunter.io/ios/app/notchless-wallpapers/id1323224735)
- [DOF Pro: Focus Calculator](https://appshunter.io/ios/app/dof-pro-focus-calculator/id1436971987)
- [DOF Cinema: Focus Calculator](https://appshunter.io/ios/app/dof-cinema-focus-calculator/id1445355862)
- [Grayn: Analog Film Camera](https://appshunter.io/ios/app/grayn-analog-film-camera/id6741391011)
- [Lumos - Light your everything](https://appshunter.io/ios/app/lumos-light-your-everything/id6749225057)

All apps by Mihai alexandru Bold: https://appshunter.io/developer/863433362

## Related topics

[addof](https://appshunter.io/ios/topics/addof) · [dof hyperfocal](https://appshunter.io/ios/topics/dof-hyperfocal)

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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 2026-10-23.*