RustyBug Offline Upload & Sell: On
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Strategically, the logistics of such can aided by the astronomical chart/data to glean varying lighting conditions.
Here's a thread that contains a handy link.
https://www.fredmiranda.com/forum/topic/1310200/0#lastmessage
http://www.suncalc.net/#/25.7891,-80.204,12/2014.08.04/06:16
(refresh using now button on page)
Your point @ different shooting time/lighting for foreground vs. sky is pertinent. Dark sky vs. astronomical twilight vs. nautical twilight vs. civil twilight can be some key time frames to be aware of.
As to the lighting though, terrestrial ambient light without direct sunlight will always be softer diffuse light. Moonlight is identical to using a reflector as it will be a reflected diffuse light by comparison with the direct sunlight being reflected off the moon.
Sans the moon for reflecting the sunlight, (and penetrating the atmosphere at an angle of refraction that retains the greater specularity), then the remnant of lighting received by terrestrial subjects will be that which is refracted by the atmosphere at angles similar to that which produce our daylight cyanic sky (albeit a lesser amount and diff angle of refraction). In short, it is going to be soft & blue as you are taking a picture of the light refracting through the atmosphere, which is different from the non-refracting, non-reflecting light, non-generating/emitting light in "dark" space.
Terrestrial subjects are illuminated by the sun. The path of that light is refracted by our atmosphere iaw with AI=AR and the subsequent color and corresponding angles of AI=AR at the subject will have a degree of contrast @ specular/diffuse accordingly. An angle of refraction @ 0, 45, 90, 135 or 180 degrees will have different amount of contrast as a result of the AI=AR family of angles involved as the light feathers/fans out. Shooting with the sun on the "other side" of the earth means that the angle of refraction will always be somewhere between 90 & 180 ... i.e very soft @ the vector force.
Expecting anything less than "soft light" when shooting @ max dark defies physics. Granted, the volume of light can be offset by the addition of more time, but the quality of the light will remain diffuse vs. specular. A desire for more specular light will require a shooting time with a different angle of refraction through the atmosphere (reflected moonlight or sans moon).
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