# LFTools — For Film Photographers

> For Film Photographers (iPhone/iPad app by Ruediger Merz.)

- Source: https://appshunter.io/ios/app/lftools/id6479173686 (this page in markdown: same URL + `.md`)
- Developer: [Ruediger Merz](https://appshunter.io/developer/1653209743)
- Category: Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 18 · 4 MB
- Languages: American English
- Released: 2024-03-16
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/lftools/id6479173686/reviews.md

## What is LFTools?

LFTools is an app for Large Format and Film Photographers. 

In version 1.5.0 LFTools contains 2 Tabs. The first one is the 'LF Tools' tab, with several sub sections. Each section has a tool to calculate certain properties which are used in large format photography. Like extended exposure times with regard to bellows extension or the magnification from a bellows draw for a given focal length. 

The second tab, 'Film Reciprocity', contains the Film Reciprocity Calculator. This calculator is of interest for all film photographers who are interested in long time exposure. With the Film Reciprocity Calculator one can overcome the so called reciprocity failure, which is inherent to almost all films. It is quite simple to use, one just has to select a film, shutter speed and aperture an the tool automatically creates a table with extended exposure times. The app comes with a pre-populated list of films from Ilford. Ilford was the only manufacture who publishes the p factor for their films. Al be it, the user can add its own films for calculation.


## Version history (last 5 releases)

### 1.5.4 — 2026-01-03

Age rating as demanded by apple.

### 1.5.2 — 2025-09-25

- Adapted for iOS 26

### 1.5.1 — 2024-07-09

- Changed "Extended Exposure Time" to "Bellows Compensation Factor" for clarification.

### 1.5.0 — 2024-04-01

- Added: Calculation of 'Minimum Subject Distance'
- Added: Calculation of 'Bellows Draw From Magnification'
- Added: Calculation of 'Magnification From Bellows Draw'
- Added: Calculation of 'Magnification From Subject Distance'
- Added: Version number to settings

### 1.0.3 — 2024-03-17

No release notes.

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## More apps by Ruediger Merz

- [DerKorb](https://appshunter.io/ios/app/derkorb/id6444223288)

All apps by Ruediger Merz: https://appshunter.io/developer/1653209743

## Related topics

[lftools](https://appshunter.io/ios/topics/lftools)

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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 2026-06-01.*