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A friend and I went to a Photoshop workshop. It was great although the little grey cells found it all a bit overwhelming... This is my output from the session, which is nothing like anything else any of the others produced! So much to learn - thank goodness it's fun to do :-)
In a classic sundial, the time is read by observing the shadow cast by an inclined style, which sweeps over the hour lines. Here, it is the hour lines that project onto the dial down to a point where the time is read.
If the principle of this sundial has been known since the 17th century, only one copy of this type, which has now disappeared, was made in France, in Besançon in 1757.
In the canopy, which is inclined according to the latitude of the place overhanging the vertical wall, incisions were made, ending with hour numerals, which let light rays pass through. During the course of the day, these rays scroll in the shadow of the wall from left to right and indicate the "0-minute" solar hour when they pass over the red dot placed in front of the index finger of the hand.
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Dans un cadran classique, la lecture de l'heure s'effectue en observant l'ombre issue d'un style incliné, qui balaye des lignes horaires. Ici, ce sont les lignes horaires qui se projettent sur le cadran et balayent un point où s'effectue la lecture de l'heure.
Si le principe de ce cadran solaire est connu depuis le XVIIème siècle, un seul exemplaire de ce type, aujourd'hui disparu, a été réalisé en France, à Besançon en 1757.
Dans l''auvent incliné selon la latitude du lieu qui surplombe la paroi verticale, on a pratiqué des incisions, terminées par des chiffres d'heures, qui laissent passer des rais de lumière. Au cours de la journée, ces rais défilent dans l'ombre du mur de la gauche vers la droite et indiquent l'heure solaire "entière" lorsqu'ils passent sur le point rouge placé devant l'index de la main.
20161214-0021
Halo on the clouds during a flight over the Alps. Captured with a Sony RX100III and developed with AuroraHDR.
Take bubble wrap and three pegs (pink, yellow and green) then invert the colours and inverse the picture. Green becomes pink, Pink becomes green, Yellow becomes blue. Voila!!
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Rolleiflex Automat K4B
CZJ Tessar 75 mm f/3,5@ f/8; 1/25
Rollei green filter
Ilford FP4+@ISO 250
Diafine 3,5+3,5 min.
Inside The Louvre in Paris. I was sat down and had my camera on the floor and took a few shots before a security guard told me to stop. After I put it away another guy came over to tell me to stand up.
Damn the French! We've started wars with them for less than that...
Ukrainian Air Force Sukhoi Su-27P Flanker passes through inverted during a slow roll performed at the Royal International Air Tattoo at RAF Fairford in July 2018
Taken with a Nikon D700 and a Nikon 50mm f1.8
Disney Concert Hall, L.A.
Architect: Frank Gehry
Inverted the image, converted to black and white, emphasized tones and shapes . . .
I had passed this one up as a throw-away shot, took a second look and decided to experiment. Once I had cropped and inverted the image, everything fell into place. Guess that's why I never discard an image . . .