露出計EX vs LightScope

くろねこ研究所 Kuroneko Lab. フィルムカメラを簡単に利用するためのシンプルな露出計です コピー機能にアプリ連携を追加しました、メモ帳などに簡単にメモできます 使い方 左のラベルが絞り値（F値）です 右のラベルがシャッタースピード（SS）です 中央は、AV-絞り優先か、TV-シャッタースピード優先かを選択します AV/TVのラベルをタップすると切り替わります An exposure meter ex made for easy use of film cameras. How to use The label on the left is the aperture value (F number) The label on the right is Shutter Speed ​​(SS). In the center, select AV-Aperture priority or TV-Shutter speed priority. Tap the AV/TV label. ISOをタップして変更します 画面を縦にスワイプすると絞り値やシャッタースピードを変更できます 画面をタップするとその位置の露出を計測しロックします もう一度タップすると標準の露出計測に戻ります スポット測光のように使えます AV/TVのStepを1段か1/2段かを選択できます ISOのStepを1段、1/2段、または1/3段に変更できます EVの表示は、ISO100の時のEV値を表示します 機種により測定できる最低の照度が変わります 機種の特性により誤差が出ますがごく小さいため大きな影響はありません Tap the ISO to change. Swipe vertically to change aperture value and shutter speed. Tap the screen to measure the exposure at that position and lock it. Tap again to return to standard exposure measurement. Can be used like spot metering. You can change the AV / TV Step to 1 step or 1/2 step. ISO Step can be changed to 1 step, 1/2 step, or 1/3 step. The minimum illuminance that can be measured varies depending on the model. There will be an error depending on the characteristics of the model, but it will not have a big effect because it is very small. フッターにあるコピー(C)ボタンで、露出情報やサムネイルをクリップボードにコピーできます メモ帳などに貼り付けることができるので活用してください You can copy exposure information and thumbnails to the clipboard with the copy button in the footer. You can paste it on a memo pad, etc. 絞り値やSSを変更するボタンを追加しました ボタンを使用するかどうかをSettingsから選択してください

LightScope is a comprehensive solution providing professional light measurement and analysis using your iOS device's camera sensor. 【Key Measurement Features】 • Illuminance (lux) Measurement: Calculates accurate illuminance by analyzing EXIF data from the camera sensor. Illuminance is derived using the formula: (F-number² / (Exposure Time × ISO)) × Calibration Factor. • Exposure (EV) Calculator: Converts measured illuminance to EV and suggests proper exposure combinations in standard stops for your ISO and aperture (or shutter) settings. • Luminous Intensity (candela) Calculation: Automatically calculates the luminous intensity of a light source based on the set distance. Uses the formula: Illuminance (lux) × Distance². • Color Temperature (K) & Tint Analysis: Precisely measures the light source's color temperature (1500K~15000K) and tint (green-magenta bias) by analyzing the camera's white balance sensor data — useful for identifying fluorescent and LED lighting. • Real-time Histogram: Visualizes the balance of shadows, midtones, and highlights through 16-level brightness distribution analysis. • Contrast Ratio Measurement: Evaluates the brightness ratio between bright and dark areas of a scene (based on 10th/90th percentiles) according to WCAG accessibility standards. • Noise Measurement (SNR): Calculates the signal-to-noise ratio in dB to evaluate image quality in the shooting environment. 【Advanced Features】 • Image Capture and Storage: Captures camera images at the time of measurement and stores them with measurement data. • Full-screen Image View: Zoom, pan, and rotate captured images for detailed inspection. • Gallery Saving: Save captured images to your device's photo library. • Measurement History and Trends: Save all measurements chronologically and chart trends for lux, EV, color temperature, contrast, and SNR. • Continuous Logging: Automatically record measurements at a set interval (1-60s) — great for lighting design and site surveys. • Full-Resolution Image Storage: Keep captured images at original quality for detailed inspection and gallery saving. • Export All History: Export every measurement as a CSV file or a PDF report. • Notes & Location Tags: Attach notes to measurements and optionally save the measurement location. • Home Screen Widget: See your last measurement (lux, color temperature, contrast, SNR) right on the home screen. • Camera Full-screen Mode: Hide panels to focus on the camera view while checking key measurements via a mini info panel. • Measurement Lock: Freeze exposure and white balance for stable, steady readings. • Spot Metering: In full-screen mode, tap anywhere to meter around that point. • Perfect Dark/Light Mode Support: All UI elements automatically adapt to the system theme. 【User Settings】 • Calibration Wizard: Enter a reading from a reference lux meter and the calibration factor is calculated automatically. Manual slider adjustment is also available. • Distance Setting: Set the distance to the light source for precise luminous intensity (cd) calculations. • Front/Rear Camera Selection: Choose the appropriate camera for your measurement situation. 【Technical Features】 • Support for measuring various light source types: natural light, LED, fluorescent, incandescent, etc. • Color temperature and tint sourced directly from the camera ISP's white balance estimation for reliable readings • 10-frame moving average filter for measurement stabilization • Center-weighted or spot (tap-to-meter) analysis for accurate evaluation of the main subject • Automatic exposure quality assessment based on histogram analysis Perfect tool for photographers, videographers, lighting designers, UI/UX developers, and anyone who needs accurate light measurements.