My friend Audrey recently asked me to join her in writing for her new blogsite which she has initiated for sharing of creative inspiration, called 365 Just Show Up. This image is one I posted there recently, after an early morning shoot with friends near Palm Beach in Sydney's north.
With photography, light and timing is everything. And sometimes that means 'showing up' when the rest of the world is sleeping. This weekend, fellow photographers Richard, Anastasia and Vlad and I arranged to meet near Palm Beach on Sydney's northern beaches area, to catch the sunrise over the water. We needed to arrive at the location somewhere between Astronomical Twilight (which was 5.17am on 7/8/10) and Nautical Twilight (5.46am on 7/8/10), in order to scout the location, get set up, and have an hour's shooting time in the magical pre-dawn light.
For those of a technical mind, Twilight has 3 defined phases: Astronomical, Nautical and Civil that refer to specific points in 6° increments of the sun's angle to the horizon before sunrise and after sunset. Each phase lasts approximately half an hour. (Australian readers can use this Geoscience Australia calculator to obtain the Sunrise / Sunset and Twilight times.)
Astronomical Twilight = the instant in the morning (or evening) when the centre of the sun is at an angle of 18° below the horizon. At this time it is possible to still see the light of stars in the sky.
Nautical Twilight = when the centre of the sun is at an angle of 12° below the horizon. At this time in the absence of moonlight, artificial lighting or adverse atmospheric conditions, it is dark for normal practical purposes. For navigation purposes at sea, the sea horizon is not normally visible. (Occurs approx. half an hour after Astronomical Twilight)
Civil Twilight = when the centre of the sun is at a 6° angle below the horizon. At this time in the absence of moonlight, artificial lighting or adverse atmospheric conditions, the illumination is such that large objects may be seen but no detail is discernible. The brightest stars and planets can be seen and for navigation purposes at sea, the sea horizon is clearly defined. (Occurs approx. half an hour after Nautical Twilight)
Sunrise: (Occurs approx. half an hour after Morning Civil Twilight)
The reverse occurs in the Evening: Sunset, Civil Twilight, Nautical Twilight, Astronomical Twilight, fading into the darkness of night.
Showing posts with label ISO 200. Show all posts
Showing posts with label ISO 200. Show all posts
Sunday, August 8, 2010
Just Show Up...
Labels:
2.5s,
Beach,
Coast,
f22,
ISO 200,
Just Show Up,
Nikon D300s,
Ocean,
Rocks,
Sea
Friday, July 23, 2010
Here Kitty Kitty Kitty...

Sometimes, on peaceful sunny afternoons, my neighbour's cat comes visiting. The tag on his collar says his name is 'Biggie'... I googled blue cats with yellow eyes and apparently he is a Chartreux, which are monastery cats that the French Carthusian monks used to keep the mice away from their Camembert... According to the Oracle (bless Wikipedia) the first letter of the official name of a Chartreux cat encodes the year of its birth; all Chartreux born in the same year have official names beginning with the same letter. The code letters rotate through the alphabet each year, omitting the letters K, Q, W, X, Y, and Z. For example, a Chartreux born in 2002 would have an official name starting with the letter T. Which means Biggie was born in 2006, making him four years old. He still has a playful kittenish spirit - his favourite game is to hide under garden furniture and then rush out to bat my feet while I'm hanging out the washing...
Labels:
1/500s,
Cat,
f3.5,
ISO 200,
Nikon D300s,
Sigma 150mm macro lens
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