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2. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

3. Enlarger - Wikipedia

   en.wikipedia.org/wiki/Enlarger

   For example, an enlargement from a certain negative as a 12 x 18 cm (approx. 5 by 7 inch) print may be sufficient for a scrapbook viewed at 50 cm (20 inches), but insufficiently detailed for an A4 print hung on a hallway wall to be viewed at the same distance, though usable at a larger 120 x 180 cm (ten times larger) on a billboard to be viewed ...

4. Solar camera - Wikipedia

   en.wikipedia.org/wiki/Solar_camera

   A number of photographers, inventors and photographic businesses contributed to the design development of the solar camera. An antecedent was the solar microscope of c.1740, [5] employed in experiments with photosensitive silver nitrate by Thomas Wedgwood and Humphry Davy in making the first, but impermanent, photographic enlargements.

5. 135 film - Wikipedia

   en.wikipedia.org/wiki/135_film

   The 24×36 mm format is common to higher-end digital image sensors, where it is typically referred to as full-frame format. On 135 film, the typical cameras produce a frame where the longer dimension of the 24×36 mm frame runs parallel to the length of the film. The perforation size and pitch are according to the standard specification KS-1870 ...

6. Boston Camera - Wikipedia

   en.wikipedia.org/wiki/Boston_Camera

   The Boston Camera, also known as Pie Face and officially classified as the K-42 Camera Model, [1] was a prototype airborne photo reconnaissance camera. It was manufactured for the United States Air Force by Boston University in 1951 [2] and was tested on the Convair B-36 and the C-97 Stratofreighter.

7. List of most expensive photographs - Wikipedia

   en.wikipedia.org/wiki/List_of_most_expensive...

   In December 2014, Peter Lik reportedly sold a photograph titled Phantom to an anonymous bidder for $6.5 million, making it potentially the third highest price paid for a photograph.