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The 3:4 aspect ratio of half frame photos can easily be cropped to 4:5 in portrait orientation without a significant reduction in image quality producing an "Instagram ready" photo. This has been reinforced by Kodak's reintroduction of half frame cameras [9] through the Kodak Ektar branded H35 half frame camera.
Prior to its use on films, the Ektar name originally referred to Eastman Kodak's premium-priced lenses for professional use, which were introduced in 1936 and sold until the 1960s. In contrast to the branding from other lens-makers, Kodak emphasized that the name was a quality mark rather than referring to any particular optical formula.
Introduced with Kodak's "Pocket Instamatic" series Daylight, Transparency, Black & White Fujifilm ceased 110 production in 2009. Lomography revived the format in 2011. 111 for roll holder 1898 Unknown 6 + 1 ⁄ 2 × 4 + 3 ⁄ 4 in 165.1 × 120.65 mm Possibly discontinued 1924 or 1929 112 for roll holder 1898 1924 7 × 5 in 177.8 × 127 mm 113
Slide projector light generation and collimation system: from left to right, mirror / reflector, bulb, condenser lens 1, green-tinted heat-absorbing glass, condenser lens 2; a centrifugal fan, used to cool the bulb, is visible at the top of the picture. A projector has three main optical elements: [3]: 39–40
The Signet 80 was Kodak's second attempt at offering a US made full camera system, the first being the ill-fated Ektra system. The Signet 80 including the accessory 35mm and 90mm lenses, cost about 75% of the cost of a comparable top-of-the-line Kodak Retina III system.
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens , but some newer types of projectors can project the image directly, by using lasers .