This photo shows a weed with tiny white flowers growing from a lighted grate in the lower (train) level of a Metro station. In the darkness of the station, this weed finds enough light to grow and bloom.
This photo was taken on October 18, 2017. Specs are:
This photo was taken while experimenting with the additive properties of light for a photography class project. The objects photographed were one small black circle made of cardstock and several white cardstock circles (small, medium, and large), plus a string of blue LED lights.
Equipment: Three color gels were used to represent the three primary additive colors. The gels used were Rogue Lighting Filters Just Blue (f-stop loss 2 1/3), Bright Red (f-stop loss 3 1/2)., and Moss Green (f-stop loss 1 1/2). The flash unit used was a Yongnuo YN-568EX II 4-Channel TTL Flash Speedlite for Canon E-TTL/E-TTL II Cameras. A string of blue LED lights was used as another source of the color blue.
Procedure: A large rectangle of black velvet was laid flat on the floor, and an arrangement of paper objects was laid on top of the velvet. The camera shutter was opened. An external flash unit with a color gel was fired once from a height of approximately 30 inches. The objects were rearranged. The flash was fired again, this time with a different gel. The objects were rearranged again. The flash was fired for a third time with the last gel. The objects were removed from the velvet and the string of blue LED lights was shaken over the black velvet. The camera shutter was closed.
Results: The purpose of the black circle was to create a black hole (no color) in order to negate the color added by the gel being flashed. The three secondary colors (cyan, magenta, yellow) are visible at the overlaps of pairs of the three primary colors (red, green, blue). The color white is seen at the overlap of all three primary colors.
(A fun exercise is to deconstruct the three arrangements of objects used, by using the color addition formulas: green+red=yellow, green+blue=cyan, blue+red=magenta.)
The blue from the light string added color and increased intensity to the otherwise solid colors. Because the lights are closer to the lens and moving, this part of the image is not as in focus as the circles. The glow from the blue LED light string does not seem to be combining with the color of the circles as expected. For example, the glow on the red circle is not magenta. This could be because the camera is photographing a solid object (the light string), rather than recording colored light.
This photo was taken on August 1, 2016. The room was in almost complete darkness and the camera was on a tripod. Specs are:
Although we planned to complete this exercise today in our back yard, the weather has not cooperated, progressing from merely overcast to active rain. Instead, archived pictures are used.
These pictures were taken of the Notre Dame Cathedral in Paris, France, in October 2015, on several different days. Three different cameras were used, experimenting with f-stop settings and exposure time. The times of day include morning (one picture), afternoon (one picture), and evening (four pictures). The pictures are taken facing West.
This picture was taken at 11 am with an Olympus TG-4 camera. Settings are:
ISO 100, 1/250 sec, f 4.9, 100 mm
This picture was taken at 2:30 pm with a Canon SX40 camera. Settings are:
ISO 200, 1/500 sec, f.6.7, 41 mm
This picture was taken at 7 pm with a Canon 50D camera. Settings are:
ISO 100, 1/6 sec, f 16, 50 mm
This picture was taken at 7:30 pm with a Canon SX40 camera. Settings are:
ISO 100, 1/6 sec, f 8, 132 mm
This picture was taken at 7:30 pm with a Canon 50D camera. Settings are:
ISO 200, 20 sec, f 16, 50 mm
This picture was taken at 8 pm with a Canon 50D camera. Settings are:
Today was warm, in the high 70s, with a blue sky, beautiful white clouds, and lots of sunlight. Driving home in the late afternoon, we saw, ahead of us, a rainbow backed by dark clouds. Until that point, I had been happily photographing the generous mixture of stratus and cumulus clouds that were punctured (visually) by contrails. The sun, descending in the West, highlighted the scene. We drove into a misting rain that lasted until we reached home. From the water standing in our yard, it was clear that there had just been a downpour. But the sun was not finished yet and chose our arrival home as the right time to challenge the dissipating rain clouds.