Shortest shadow of 2017
Taken by B.A.Zajac on June 21, 2017 @
Berlin, DE
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Camera Used: SAMSUNG GT-S5620
Exposure Time: 1/3030
Aperture: f/2.8
ISO: 80
Date Taken: 2017:06:23 23:27:17
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Details:
On 20 and 21 June I took photos of my own shadow and the shadow of a 1-meter measuring rod. Later the shadows were measured for length using MS Paint and GIMP. The sun angle was calculated using the inverse tangent function, also known as arctan or tan-1.
For Berlin's latitude 52.5°N the maximum sun angle is 60.9° on both days, using Stellarium and timeanddate.com as sources. Conversely, shadows are shorter than any other time during the year. All three photos were taken within 15 minutes of solar noon 13.08 CEST, during which time the sun angle does not change significantly. The vertical alignment of the measuring rod was done by eye on the 20th and with a tripod with bubble level on the 21st.
The first photo is from the summer solstice and shows an overestimate of one degree (61.9°), a value more appropriate for Leipzig than Berlin. The second two photos from 20 June yielded underestimates of roughly one and two degrees (57.0° for my shadow and 58.6° for the meter rod). The second value lands one in the Baltic. The first value gives a location northeast of Copenhagen in southern Sweden!
Photographer's website:
No URL provided.
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