TimerGlass Support / TimerGlass 技术支持
TimerGlass is a field companion for film photographers. It calculates reciprocity-corrected exposure times for 88 film stocks (with ND/GND/CPL/color/center-ND filters, custom filters, and bellows compensation), designs and verifies pinhole cameras with Sunny-16 exposure estimation, and runs a long-exposure timer with Lock Screen / Dynamic Island Live Activities. You can also view each film's reciprocity curve and share exposure settings as vintage-style cards. Settings cover appearance including Dark Mode, an optional hand-off to the companion MeterGlass app, and local export and import of your history and custom films.
Frequently Asked Questions
How do I calculate corrected exposure time?
Select your film stock, set the metered exposure time, optionally add filters and bellows compensation, and the corrected time is displayed automatically. Graduated ND (GND) filters are listed for reference but do not add to whole-frame exposure — meter the clear half as usual.
My film is not in the list. What should I do?
Go to Settings > Custom Films to add your own film with a custom reciprocity correction factor (P value) or lookup table. If you know the P value from the film's data sheet, enter it there.
How accurate is the calculation?
TimerGlass follows the manufacturer's own datasheets first, and many reciprocity curves were rebuilt directly from those manuals. Films published as a table are interpolated logarithmically, and the app flags a result that falls outside the range the manufacturer actually tested. Figures may differ slightly from other apps because interpolation methods differ; in practice the difference is negligible.
Does the app work offline?
Calculating, timing and storing your data all work with no network connection. A few things you start yourself can leave the app — opening the companion MeterGlass app, or an App Store page — but nothing is ever uploaded.
How do I change the language?
Go to Settings > Language. You can choose from English, Simplified Chinese, Traditional Chinese, Japanese, German, or French. You can also follow your system language setting.
How does the timer work with the shutter?
Tapping “Set Timer” loads the exposure but does not start counting. Switch to the Timer tab and tap the large start button at the moment you open the shutter, so the countdown matches your actual exposure. Stopping requires a one-second hold to prevent accidental taps. You can also set a duration directly on the Timer tab and start it against the shutter without going through the calculator.
Why did I get a notification after the timer finished?
If you are away from your phone when a long exposure ends, TimerGlass sends a completion alert plus follow-up reminders so you don't forget to close the shutter. They are cancelled automatically once you return to the app.
My filter is not in the list. What should I do?
In the filter picker, scroll to the “Custom” section and add your own filter with its measured light loss in stops (useful for variable NDs or old filters that differ from their marked values).
How do I share an exposure?
Tap the small share icon next to a result (calculator, pinhole tool, or history detail). You'll see a preview of a vintage-style card that you can share or save to Photos.
Can I back up my history and custom films?
Yes. In Settings you can export and import your exposure history and custom films as local files. Nothing is uploaded to a server.
What is the MeterGlass button?
MeterGlass is an optional companion light meter from the same studio. TimerGlass can hand off your film's ISO to it, and a measured time can come back to the calculator. Both apps work fine on their own; if MeterGlass is not installed, the link opens its App Store page.
How do I switch to Dark Mode?
Settings → Appearance, then choose System, Light or Dark. The change takes effect immediately.
System Requirements
iOS 17.0 or later. iPhone and iPad.
Contact & Feedback
If you encounter any issues, have feature requests, or want to suggest a film stock to add, please contact us.
Developer: ArgentGlass Lab
Email: argentglasslab@gmail.com
Website: argentglass.com
TimerGlass 是胶片摄影师的现场工具。支持 88 种胶片的倒易律修正计算（含 ND/GND/CPL/彩色/中央渐变滤镜、自定义滤镜与皮腔补偿），提供针孔相机设计与校验（含 Sunny-16 曝光估算），内置长曝光计时器并支持锁屏与灵动岛实时倒计时。还可以查看每种胶片的倒易律曲线，并把曝光参数生成复古卡片分享。设置中另有外观（含深色模式）、与配套应用 MeterGlass 的可选联动，以及历史与自定义胶片的本地导出与导入。
常见问题
如何计算修正曝光时间？
选择胶片，设定测光时间，按需添加滤镜和皮腔补偿，修正后的曝光时间会自动显示。渐变 ND（GND）滤镜列出仅作参考，它不影响整幅画面的曝光——按未压暗的那一半正常测光即可。
我的胶片不在列表里怎么办？
进入设置 > 自定义胶片，可以添加自己的胶片并设定修正系数（P 值）或查找表。如果你知道胶片数据表上的 P 值，直接输入即可。
计算精度如何？
TimerGlass 优先采用厂商数据手册，大量倒易律曲线是直接依据手册重建的。以数据表形式给出的胶片采用对数插值；当结果超出厂商实测范围时，应用会给出提示。与其他 app 可能有微小差异，这是不同插值方法造成的，实际使用中可以忽略。
需要联网吗？
计算、计时与数据存储都不需要网络。少数由你主动触发的操作会跳出应用——例如打开配套的 MeterGlass 或 App Store 页面——但不会上传任何内容。
如何切换语言？
进入设置 > 语言，可选择英文、简体中文、繁体中文、日文、德文或法文，也可以跟随系统语言设置。
计时器怎么和快门配合？
点「启动计时器」只是装填曝光参数，不会开始倒计时。切到计时器页后，在打开快门的同一瞬间按下大的开始按钮，让倒计时和实际曝光对齐。停止需要长按一秒，防止误触毁掉长曝光。你也可以直接在计时器页设定时长，不经过计算器，同样对着快门开始计时。
计时结束后为什么还会收到提醒？
长曝光结束时如果你不在手机旁，TimerGlass 会发送完成提醒和后续追加提醒，避免忘记关快门。回到 app 后剩余提醒会自动取消。
我的滤镜不在列表里怎么办？
在滤镜选择页底部的「自定义」分区，可以按实测档数添加自己的滤镜（适合可变 ND 或与标称值有出入的老滤镜）。
如何分享曝光参数？
点结果旁的小分享图标（计算器、针孔工具、历史详情都有），会先看到复古风卡片的预览，可以分享或存入相册。
可以备份历史和自定义胶片吗？
可以。在设置中能把曝光历史与自定义胶片导出为本地文件，也能随时导入。不会上传到任何服务器。
MeterGlass 按钮是做什么的？
MeterGlass 是同一工作室出品的可选测光配套应用。TimerGlass 可以把当前胶片的 ISO 传给它，测得的时间也能回传到计算器。两个应用各自都能独立使用；若未安装 MeterGlass，该链接会打开它的 App Store 页面。
怎么切换深色模式？
进入设置 → 外观，可选择跟随系统、浅色或深色，切换即时生效。
系统要求
iOS 17.0 或更高版本。支持 iPhone 和 iPad。
联系与反馈
如遇到任何问题、有功能建议、或希望添加某种胶片，请联系我们。
开发者：ArgentGlass Lab
网站：argentglass.com