On reflection…

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The prize-winning photograph presented in Readers’ Gallery (12 December) had a potentially misleading caption.

Reflection is not the process of real image formation in this photograph. It is refraction of the light as it enters and leaves the glass globe which produces a real image in the space between the globe and the camera.

When the camera is focused on the “real” image a clear picture can result, as in this case. The picture also is not of Calton Hill although the flowers and pillared structure are on the hill.

AW Barclay

Greenbank Row

Edinburgh