Bug reports, questions, or a camera body you'd like added: the.flash.d.c.ww84@gmail.com
How is depth of field computed? From the standard hyperfocal/DoF formulas, using a circle of confusion of sensor diagonal ÷ 1500 (the modern standard; Pro lets you choose d/1730, d/1000, or a custom value).
Why does the far limit show ∞? When you focus at or beyond the hyperfocal distance, everything from the near limit to infinity is sharp.
How do I restore my Pro purchase? Settings (gear icon) → Restore Purchase. It restores on any device signed in with the same Apple ID.
Is my camera missing? You can always pick its sensor format directly (Full Frame, APS-C, etc.) for an exact result — or email us to add the body.
问题反馈、bug、或想加的相机机身： the.flash.d.c.ww84@gmail.com
景深怎么算的？ 用标准超焦距/景深公式，弥散圆取 传感器对角线 ÷ 1500（现代标准；Pro 可选 d/1730、d/1000 或自定义）。
远界为什么显示 ∞？ 对焦在超焦距或更远时，从近界到无穷远都清晰。
怎么恢复 Pro 购买？ 设置（齿轮）→ 恢复购买；同一 Apple ID 在任意设备都能恢复。
没有我的相机？ 可以直接选画幅（全画幅 / APS-C…）得到精确结果，或邮件告诉我们补充机身。