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2. B&H Photo - Wikipedia

   en.wikipedia.org/wiki/B&H_Photo

   B&H Photo Video (also known as B&H Photo and B&H and B&H Foto & Electronics Corporation) is an American photo and video equipment retailer founded in 1973, based in Manhattan, New York City. [1] B&H conducts business primarily through online e-commerce consumer sales and business to business sales, as they only have one retail location.

3. Polaroid 20×24 camera - Wikipedia

   en.wikipedia.org/wiki/Polaroid_20×24_camera

   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).

4. Dot matrix printing - Wikipedia

   en.wikipedia.org/wiki/Dot_matrix_printing

   Although the text quality of a 24-pin was still visibly inferior to a true letter-quality printer such as a daisy wheel or laser printer, print quality was greatly superior to a 9-pin printer. As manufacturing costs declined, 24-pin printers gradually replaced 9-pin printers. By the dawn of the 1990s, inkjet printers became more common as PC ...

5. Full-frame DSLR - Wikipedia

   en.wikipedia.org/wiki/Full-frame_DSLR

   The sizes of sensors used in most current digital cameras, relative to a 35 mm format. A full-frame DSLR is a digital single-lens reflex camera (DSLR) with a 35 mm image sensor format (36 mm × 24 mm). [1] [2] Historically, 35 mm was one of the standard film formats, alongside larger ones, such as medium format and large format.

6. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras, a lens of a given focal length gives a narrower field of view in such cameras.

7. Engineering drawing abbreviations and symbols - Wikipedia

   en.wikipedia.org/wiki/Engineering_drawing...

   When the letter X is preceded by a space, this means "by". For example, a chamfer may be called out as X [2] or ( ) number of places—for example, 8X or (8) When a dimension is used in multiple places either of these prefixes can be added to the dimension to define how many times this dimension is used. This example signifies eight places.