📷 相机裁切系数与等效焦距Crop Factor Calculator

使用说明与常见问题How-to & FAQ

「相机裁切系数与等效焦距」是什么？What is the Crop Factor Calculator tool?

裁切系数 = 全画幅对角线 43.27 mm / 传感器对角线；等效焦距 = 焦距 × 系数，等效光圈 = 光圈 × 系数。本地处理。Crop factor = 43.27 mm full-frame diagonal / sensor diagonal; equivalent focal length = focal × factor, equivalent aperture = f-number × factor. Processed locally.

如何使用「相机裁切系数与等效焦距」？How do I use the Crop Factor Calculator tool?

填写传感器的宽和高（毫米）、镜头焦距和光圈，即可得到裁切系数、等效焦距和等效光圈。结果会随输入实时更新。Enter the sensor width and height in mm, the focal length and the aperture to get the crop factor, equivalent focal length and equivalent aperture. The result updates as you type.

常见系数？Common factors?

APS-C 约 1.5（佳能约 1.6），M4/3 为 2，1 英寸约 2.7。APS-C ≈ 1.5 (Canon ≈ 1.6), Micro Four Thirds 2, 1-inch ≈ 2.7.

能举个计算实例吗？Can you show a worked example?

例如在「相机裁切系数与等效焦距」中填 传感器宽 mm = 23.5，传感器高 mm = 15.6，镜头焦距 mm = 35，光圈 f/ = 1.8，结果区显示：裁切系数：1.534；等效焦距：53.7 mm；等效光圈（景深）：f/2.8For example, entering Sensor width mm = 23.5, Sensor height mm = 15.6, Focal length mm = 35, Aperture f/ = 1.8 in the Crop Factor Calculator gives: Crop factor: 1.534; Equivalent focal length: 53.7 mm; Equivalent aperture (depth of field): f/2.8

哪些输入会被检查？Which inputs are validated?

「相机裁切系数与等效焦距」会检查这些输入——「传感器宽 mm」、「传感器高 mm」、「镜头焦距 mm」、「光圈 f/」：必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Crop Factor Calculator checks its inputs — "Sensor width mm", "Sensor height mm", "Focal length mm", "Aperture f/": required, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「相机裁切系数与等效焦距」的设置：「传感器宽 mm」默认 23.5；「传感器高 mm」默认 15.6；「镜头焦距 mm」默认 35；「光圈 f/」默认 1.8。每次生成结果都按当前设置处理。Settings in the Crop Factor Calculator — "Sensor width mm" default 23.5; "Sensor height mm" default 15.6; "Focal length mm" default 35; "Aperture f/" default 1.8. The result always uses the current settings.

计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?

「相机裁切系数与等效焦距」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Crop Factor Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.

「相机裁切系数与等效焦距」免费吗？需要注册吗？Is the Crop Factor Calculator free? Do I need an account?

「相机裁切系数与等效焦距」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Crop Factor Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.