Tools工具
Blue Hour Calculator蓝调时刻计算器
The blue hour is short — here is exactly when it starts and ends, morning and evening, anywhere on Earth.蓝调时刻转瞬即逝——这里是它精确的开始与结束时间，清晨与傍晚，适用于地球上任意地点。
- Set your location (auto or manual) and the date you plan to shoot.设置你的位置（自动或手动）与计划拍摄的日期。
- Check the four blue hour boundaries — morning and evening.查看清晨与傍晚共四个蓝调时刻边界。
- Arrive 15 minutes before blue hour starts: the deepest color develops right at the boundary, and city lights look best just after civil twilight ends.在蓝调时刻开始前 15 分钟到达：最深的颜色恰在边界处出现，而城市灯光在民用暮光结束后最美。
Blue hour is roughly twice as long at the equator as at 50° latitude. In summer at high latitudes it can barely exist — check the timeline before planning a long-exposure evening.赤道地区的蓝调时刻大约是北纬 50° 的两倍长。高纬度夏季它可能几乎不存在——规划长曝光之夜前先看看时间轴。
