# 光尺 - 胶片测距/测光/暗光测光仪

> Film photography light meter and laser rangefinder with reciprocity failure compensation. (iPhone/iPad app by 浩宇 李.)

- Source: https://appshunter.io/ios/app/id6758870725 (this page in markdown: same URL + `.md`)
- Developer: [浩宇 李](https://appshunter.io/developer/1875349921)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 4 MB
- Languages: English
- Released: 2026-02-10
- Data updated: 2026-06-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/id6758870725/reviews.md

## What is 光尺?

光尺是专为胶片摄影师打造的“暗光克星”与“测距神器”。我们将专业的测光表与精密的激光测距仪合二为一，旨在解决旁轴与估焦相机在复杂环境下的拍摄难题。无论是微光夜景还是快速抓拍，光尺都能助你精准出片。

【核心功能】

首创暗光测光引擎 突破传统手机测光极限，专为微光环境调校。在极暗环境下依然能提供精准的曝光读数，让你的夜景胶片不再欠曝。

LiDAR 激光精准测距 调用 Apple LiDAR 激光雷达技术，实现厘米级精度的实时测距。彻底告别“黄斑老化看不清”和“全凭感觉估焦”的窘境，让每一次快门都清晰锐利。

智能倒易律补偿 内置主流胶卷倒易律数据库。无需查表，无需心算，只需选择胶卷型号，App 自动计算长曝光所需的补偿时间。

【解决痛点】

拯救废片： 解决夜景拍摄因测光不准导致的死黑问题。

解放大脑： 告别繁琐的倒易律计算公式和随身携带的纸质表格。

老机新生： 即使是黄斑对焦失效的老相机，也能通过“光尺”获得现代化的对焦体验。

【适用人群】

胶片/模拟摄影发烧友

旁轴相机 (Leica M系列等) 及估焦相机 (Rollei 35等) 玩家

热衷于城市夜景与长曝光创作的摄影师

## Key features

- Low-light metering engine
- LiDAR laser precise focusing
- Intelligent reciprocity failure compensation
- Rangefinder and zone focus assistance
- Accurate exposure for night scenes
- Modern focusing for old cameras

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 暗光测光永久使用 | $2.99 | one-time |
| 测距永久会员 | $2.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/id6758870725/reviews.md

### 5/5 — 测距很准 暗光测光也还行

*2026-02-24*

不错 很易用

## Frequently asked questions about 光尺

### What is the short name for 光尺 - 胶片测距/测光/暗光测光仪?

The short name for the app is '光尺'.

### Does 光尺 have ads?

No, 光尺 does not contain advertisements.

### What devices is 光尺 compatible with?

光尺 is compatible with both iPhone and iPad devices.

### How accurate is the LiDAR laser rangefinder in 光尺?

The LiDAR laser in 光尺 provides centimeter-level precision for real-time distance measurement, helping to overcome focusing difficulties.

### Can 光尺 help with long exposure photography?

Yes, 光尺 includes a database of mainstream film types to automatically calculate necessary compensation times for long exposures, eliminating manual calculations.

### What kind of photography challenges does 光尺 solve?

光尺 solves issues like underexposed night shots due to inaccurate metering and the difficulty of precise focusing with older cameras or in low light.

### How often is 光尺 updated?

The latest version of 光尺 was released on May 4, 2026, indicating recent development activity.

### What is the user rating for 光尺?

光尺 has a perfect rating of 5.0 stars based on one review.

## Version history (last 4 releases)

### 3.0.1 — 2026-05-04

1.优化了画幅和焦距直接真实视角预览框
2.新增区分曝光模式
3.优化页面布局
4.优化APP速度

### 1.1.3 — 2026-02-24

1.新增焦距切换28-200焦距
2.新增有极/无极1/3测光数值展示
3.新增计算器（画幅计算/皮腔计算）
4.优化暗光曝光算法
5.优化APP速度
6.优化测距展示信息

### 1.1.1 — 2026-02-18

优化暗光测光模块
可以自定义输入测光数据进行倒易律计算
更准确查看暗光曝光预览图

### 1.0 — 2026-02-10

No release notes.

## More apps by 浩宇 李

- [Negative Scanner](https://appshunter.io/ios/app/negative-scanner/id6769307918)

All apps by 浩宇 李: https://appshunter.io/developer/1875349921

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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 2026-06-08.*