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The Polaroid 20×24 camera is a very large instant camera made by Polaroid, with film plates that measure a nominal 20 by 24 inches (51 cm × 61 cm), giving the camera its name, although at least one camera takes pictures that are 23 by 36 inches (58 cm × 91 cm).
Polaroid integral film pack: 1986: Oct. 2019: 3 + 5 ⁄ 8 × 2 + 7 ⁄ 8 in: 10 or 12 with original Polaroid; 8 with Polaroid Originals/Impossible Project: Discontinued by Polaroid in 2008; reintroduced by Impossible Project in 2010; discontinued by Polaroid Originals in 2019. Captiva, Type 500: Polaroid integral film pack: 1993: 2006: 2 + 7 ...
The most common large format is 4×5 inches (10.2x12.7 cm), which was the size used by cameras like the Graflex Speed Graphic and Crown Graphic, among others. Less common formats include quarter-plate (3.25x4.25 inches (8.3x10.8 cm)), 5×7 inches (12.7x17.8 cm), and 8×10 inches (20×25 cm); the size of many old 1920s Kodak cameras (various versions of Kodak 1, 2, and 3 and Master View cameras ...
Pixels are square and is often equal to 1, for example, a 1,000 by 1,000-pixel sensor would have 1,000,000 pixels, or 1 megapixel. On full-frame sensors (i.e., 24 mm 36 mm), some cameras propose images with 20–25 million pixels that were captured by 7.5–m photosites , or a surface that is 50 times larger.
In 1947 Edwin H. Land introduced the Polaroid-Land process. [4] The first instant films produced sepia tone photos. [5] A negative sheet is exposed inside the camera, then lined up with a positive sheet and squeezed through a set of rollers which spread a reagent between the two layers, creating a developing film "sandwich".
(* The pixel number of 6,000x4,000 ist the number of "effective pixels". The sensor usually has a few extra rows of pixels on all four sides, which explains the sensor resolution of 24.3 MPixels often stated, but no information about the exact image size available.) 6,016 4,000 24,064,000 24.1 Nikon D3300 Canon M50: 6,048 4,032 24,385,536 24.4
When the Polaroid SX-70 was introduced in 1972 it used a film pack of 10 film sheets where each film sheet had a size of 3.5 x 4.25 in 2 with a picture area of 3.125 x 3.125 in 2 and ASA film speed of 150. [14]
The 6 × 6 cm image size was the classic 1:1 format in the recent past. 120 film can still be found and used today. Many Polaroid instant films were designed as square formats. Furthermore, up until August 2015, photo-sharing site Instagram only allowed users to upload images in 1:1 format.