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Star trails and planets...with or without a telescope.
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Friday, 18th May, 2012 (GMT)
Friday, 25th May, 2012 – Thursday, 31st May, 2012 (GMT)
Friday, 1st June, 2012 – Thursday, 7th June, 2012 (GMT)
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Maximum number of entries per user:
Maximum number of entries in challenge:
26 exposures, at 2 week intervals to record the solar disc positions over 1 year. Each exp[osure at exactly noon. Camera was placed in a prealigned metal bracket for indexing south in azimuth.
|Submitted:||Friday, 25th May, 2012 12:45 (GMT)|
|Taken:||Friday, 25th May, 2012|
|Focal length:||35 mm|
|Shutter speed:||1/1000 sec|
|Notes:||Camera stored in freezer in Zipper bag with dessicant between shots, and allowed to warm for 2 hours before each exposure. 27th exposure using a meter to capture normal sky and trees, hand held, without sun image. . Vertical angle was set by calculation to just fit image into the frame. Tilt was caused by exposing at standard time noon instead of noon based upon exact longitude. One sun image near top loop caused by indexing error when a volunteer took over during my vacation.|
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