# EXPOCAL — Exposure & director's tools

> Exposure & director's tools (iPhone/iPad app by JOHN MORGAN BROWN.)

- Source: https://appshunter.io/ios/app/expocal/id6774008263 (this page in markdown: same URL + `.md`)
- Developer: [JOHN MORGAN BROWN](https://appshunter.io/developer/6773414535)
- Category: Utilities, Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 28 MB
- Languages: American English
- Released: 2026-07-02
- Data updated: 2026-08-12
- User reviews in markdown: https://appshunter.io/ios/app/expocal/id6774008263/reviews.md

## What is EXPOCAL?

EXPOCAL is the on-set exposure companion for cinematographers, DPs, and gaffers — 
   every calculation you reach for between scouting a location and rolling, in one fast,
   dark-themed app.
  
   Nail exposure
   Incident metering math built on ISO 2720: dial in ISO/EI, shutter angle, and frame 
   rate to get the exact T-stop — or work backwards from an aperture to the lux you 
   need. Handles dual-base sensors and broadcast gain (dB) too.
  
   Match your gear
   Pick from a built-in library of cinema cameras and lenses. Check sensor coverage, 
   mount compatibility, and how a lens, extender, or adapter behaves across your kit.
  
   Director's viewfinder
   Frame a shot right on your phone. Choose a camera and focal length and the live 
   preview matches that lens's field of view — pinch or use the thumb zoom slider to 
   find the frame before the camera is even built. Overlay mode draws the exact framing 
   on a wide preview.
 
   Depth & focus
   Hyperfocal distance, depth of field, and aperture sweeps with sweet-spot, 
   diffraction, and noise guidance.
  
   Light & color
   ND filter stops, white-balance mired shifts, and CTB/CTO/plus-green gel 
   recommendations.
  
   Live light-meter dial-in (LIT DUO)
   Connect a LIT DUO meter over Bluetooth, set a target color temperature, and dial your
   RGB fixtures until the marker lands on the reticle — it locks green and chimes when 
   you hit it. Warm–cool and magenta–green guides show exactly which way to push.
  
   Export
   Generate clean PDF reports for scene and sensor planning.
  
   EXPOCAL gives estimates to support your judgment on set — always confirm critical 
  exposures with your meter and monitor.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


## Version history (last 2 releases)

### 1.5.2 — 2026-08-11

• New camera: Sony FX5 (full-frame, triple base ISO 800/4000/12800).
• Export the grandMA3 calibration plugins straight from the app (Pro).
 • Fixes external teleconverter exposure — the widest usable aperture now shifts with the extender instead of a flat two-stop change.

### 1.5 — 2026-08-11

No release notes.

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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 2026-08-12.*