…also known as ‘Daylight’s Gate’ – that period of the evening when daylight fades and twilight draws on…

At this time of the year an evening (or early morning) walk will reward you with some magical sky-sights. Clear sky and sun just below the horizon gift us with ‘The Blue Hour’.
The technical explanation has to do with the relative diffusibility of shorter wave lengths of light (the blue-er rays) as against the longer wavelengths (the red-er rays). During the blue hour red light passes out through space whilst the blue light scatters into the atmosphere and reaches the Earth’s surface. ‘Chappius absorbtion’ and its interaction with ozone also plays a part but if too much science makes your head spin, don’t worry. The important thing is to observe this wonderful phenomenon and just enjoy the effect and the dramatic views that can be seen.

If you enjoy photography then the Blue Hour is a wonderful time to experiment and let your imagination run free. In days gone by, when we had to use rolls of film, wait for them to be developed and returned – we might discover that perhaps we should have done something completely different (fine-tune the exposure, adjust the angle – you know the story.) And by the time we’re able to make corrections the blue hour window has passed and it’s all too late. The joy of using modern technology is that we get an instant result. Errors can be corrected right away – and by the end of our walk we’ll have a collection of wonderful ‘daylight gate’ mood photos to savour and enjoy.
