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Uploaded 28-Feb-23
Taken 6-May-22
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9 of 781 photos
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Dimensions5472 x 3648
Original file size17.6 MB
Image typeJPEG
Color spacesRGB
Date taken6-May-22 13:44
Date modified8-May-22 18:29
Shooting Conditions

Camera modelL1D-20C
Focal length10.26 mm
Focal length (35mm)28 mm
Max lens aperturef/2.8
Exposure1/100 at f/6.3
FlashNot fired
Exposure bias+1/3 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 100
Metering modeCenter-weighted average
Digital zoom1x
jpg large 72 dpi-2

jpg large 72 dpi-2

exture and shape - Denge Sound Mirrors, also known as Acoustic Mirrors, Concrete Dishes, or Listening Ears, are large concrete structures designed as an early warning system for Britain to detect enemy aircraft.
These worked by focusing the sound from the plane’s engine so it could be heard before it was visible.
There were three designs of mirrors, 20ft, 30ft, and 200ft, and all three can be seen in Greatstone