# Lens Pattern — Grid Lens Calibration Pattern

> Grid Lens Calibration Pattern (iPhone/iPad app by Stage Precision GmbH.)

- Source: https://appshunter.io/ios/app/lens-pattern/id6761390030 (this page in markdown: same URL + `.md`)
- Developer: [Stage Precision GmbH](https://appshunter.io/developer/1852817409)
- Category: Utilities, Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 18.6 · 1 MB
- Languages: English
- Released: 2026-04-02
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/lens-pattern/id6761390030/reviews.md

## What is Lens Pattern?

Grid Professional Test Patterns for Camera Calibration

Turn your iPad, iPhone, or Apple TV into a precision test pattern generator for camera and lens analysis.

Lens Pattern displays pixel-accurate test charts directly on your device screen — no printed charts, no extra hardware. Perfect for camera calibration, lens quality testing, color grading verification, and production monitoring.

INCLUDED TEST PATTERNS:

Markers & Calibration
• Grid Tags — AprilTag marker grid with adjustable tag size and start ID, ideal for camera calibration and spatial tracking

Color & Exposure
• SMPTE Bars — Standard SMPTE EG-1-1990 color bars
• SMPTE 303M — HD color bars with PLUGE and Y-ramp zones
• EBU Bars — EBU Tech 3325 color bars (75% and 100%)
• ColorChecker — Classic 24-patch color reference chart
• Color Scales — R/G/B/C/M/Y/W gradient ramps with percentage markers
• Clipping — Shadow and highlight clipping test (1% steps) with stepped ramp
• Grayscale — 21-step grayscale ramp with percentage labels

Geometry & Focus
• Crosshatch — Grid pattern for distortion analysis
• Checkerboard — Black/white checkerboard for resolution testing
• Caro — Diamond pattern (45° rotated checkerboard)
• Dot Grid — Uniform dot array for distortion measurement
• Siemens Star — Resolution target for sharpness evaluation
• Focus Chart — Comprehensive focus and resolution target

Timing & Animation
• Motion Test — Moving bars for rolling shutter and motion blur analysis
• Timecode — Real-time HH:MM:SS:FF display at 60fps
• Flicker — Adjustable frequency flicker (0.5–30 Hz)

KEY FEATURES:
• Full-screen, pixel-perfect rendering on any screen size
• Physical dimensions in millimeters displayed on iOS devices


## Version history (last 2 releases)

### 1.2 — 2026-04-15

disable Screensaver during display pattern

### 1.1 — 2026-04-02

No release notes.

## More apps by Stage Precision GmbH

- [SP Grid Viewer](https://appshunter.io/ios/app/sp-grid-viewer/id6741116815)

All apps by Stage Precision GmbH: https://appshunter.io/developer/1852817409

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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 2026-05-15.*