10 most difficult photography riddlesPhotography quiz
What term would photographers use to describe the quality of blurred part of the photo?
Bokeh has been defined as "the way the lens renders out-of-focus points of light". It can be good or unpleasant, depending on the lens aberrations and aperture shape. The term comes from Japanese for "blur".
What was the exposure time of this photo?
about 10 seconds
about 10 minutes
about 1 hour
about 8 hours
The length of stars trails is pretty much the same as the distance travelled by an hour hand of clock during 30 minutes. But the Earth rotates twice as slow compared to the hour hand of a clock (one rotation per day, while clock's hour hand makes two).
How many shots did color photography pioneers take for every photo?
The first permanent color photographs were taken using the three-color-separation principle first published by physicist James Clerk Maxwell in 1855. Maxwell's idea was to take three separate black-and-white photographs through red, green and blue filters. This technique was used by Prokudin-Gorskii in this photo of Austro-Hungarian POWs.
Kodak, Fujifilm and Agfa used to be top producers of photographic films and equipment. Which of these companies best survived the advent of digital photography?
all of them
Only Fujifilm has survived the digital revolution. AgfaPhoto GmbH, separated from Agfa holding in 2004, filed for bankruptcy after just one year. The Agfa photographic brands are now licensed to other companies. Eastman Kodak filed for bankruptcy in January 2012.
World's fastest high-speed cameras were built to take photos of specific objects. What kind of objects?
nuclear bomb explosions
The rapatronic cameras are capable of recording a still image with an exposure time as brief as 10 nanoseconds (that would give 100 million frames per second if the camera was capable to do multiple pictures). The camera uses two polarizing filters mounted with their polarization angles at 90° to each other and a Faraday cell which briefly changes the polarization plane of light passing through it, acting as a shutter.
What kind of furniture was specifically made for photographers in the mid-19th century?
The heavy specialized tables known as "Broody stands" were factory-made to keep models steady during the long exposure times. The table typically had a weighty cast iron base for stability, plus an adjustable-height pipe leg to use as either a model's armrest or neck rest.
In which year was the earliest surviving photograph created?
Although Nicéphore Niépce took the first fixed, permanent photograph in 1822, it was later destroyed. The earliest surviving photograph by him is dated c. 1826 and is called 'View from the Window at Le Gras' (La cour du domaine du Gras). The image was created at Saint-Loup-de-Varennes and it captures the roof and surrounding countryside of the estate - Le Gras.
In 2012, NASA published famous 'Black Marble' night lights images. What are the lights in the uninhabited regions of western Australia caused by?
These images were assembled from data acquired over nine days in April 2012 and 13 days in October 2012. This means fires and other lighting (such as ships) could have been detected on any one day and integrated into the composite picture, despite being temporary phenomena - giving the appearance of a massive blaze.
What kind of lens was most likely used for this photo?
fixed focal length
Such shallow depth-of-field is possible with lens of large aperture size (small f-number). The large aperture is a typical feature (and advantage) of a fixed focal length lens. The photo was taken with a 50mm f/1.4 lens.