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[[File:35mm MF LF Comparison.svg|right|Comparison of 35 mm, medium format, and large format|thumb]]
'''Large format''' photography refers to any imaging format of {{cvt|9 × 12|cm|in}} or larger. Large format is larger than "[[medium format]]", the {{cvt|6 × 6|cm|in}} or {{cvt|6 × 9|cm|in}} size of [[Hasselblad]], [[Mamiya]], [[Rollei]], Kowa, and [[Pentax]] cameras (using [[120 film|120- and 220-roll film]]), and much larger than the {{cvt|24 × 36|mm|in}} frame of [[135 film|35 mm]] format.
The main advantage of a large format, film or digital, is a higher resolution at the same pixel pitch, or the same resolution with larger pixels or grains which allows each pixel to capture more light enabling exceptional low-light capture. A 4×5 inch image (12.903 mm²) has about 15 times the area, and thus 15 times the total resolution, of a 35 mm frame (864 mm²).
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===National Park Service documentation programs===
Large format film is also used to create a record of historic places and things for the [[National Park Service]] documentation programs. The [[Historic American Buildings Survey]] (HABS), the [[Historic American Engineering Record]] (HAER), and the [[Historic American Landscapes Survey]] (HALS) require large format film-based photography. 4×5″, 5×7″, and 8×10″ large format film formats are the only acceptable formats for inclusion in these collections at the [[Library of Congress]]. 4x5 and 5x7 are generally used in the field (5×7″ is preferred for very significant buildings) and 8×10″ is generally
HABS, HAER, and HALS also requires the increased resolution of large format film. A sheet of 5×7″ film has almost twice the resolution of 4×5″ film, and 4×5″ is almost 16 times larger than a 35 mm film image (24×36 mm). This added negative size not only allows for more detail, but the large format [[polyester]] film is also far more durable than [[acetate]] 35 mm stock. HABS, HAER, and HALS require that all submissions to the Library of Congress include the original film (archivally washed) and it must also include contact prints on fiber-based paper; these contacts are the same size as the film being submitted, 4×5″, 5×7″, or 8×10″, and the large size allows people to readily see the prints, while 35 mm contacts would be too small and would require magnification.
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* [[Michael A. Smith (photographer)|Michael A. Smith]] (8×10", 8×20" and 18×22")
* [[Alec Soth]]
* [[David Stephenson (photographer)|David Stephenson]]
* [[Joel Sternfeld]]
* [[Ezra Stoller]]
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