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Format is the name of the process; some formats may have multiple names in common usage. Creator is the individual or company most directly attributable as the developer of the system. Year created usually refers to the earliest date that the system was used to completion (i.e. projection), but may refer to when it was developed if no known ...
A tondo (pl.: tondi or tondos) is a Renaissance term for a circular work of art, either a painting or a sculpture. The word derives from the Italian rotondo , "round". The term is usually not used in English for small round paintings, but only those over about 60 cm (two feet) in diameter, thus excluding many round portrait miniatures – for ...
A circular letter or a circular may refer to: Circulaire, text broadly disseminated for the members of a service, of an enterprise, or of an administration; Circular Letter (Interlingua), an early Interlingua publication; Circular letter or encyclical, a letter written by a bishop and addressed to his clergy; Government circular
Today, flyers range from inexpensively photocopied leaflets to expensive, glossy, full-color circulars. Flyers in a digital format can be shared on the internet. Flyers in a digital format can be shared on the internet.
To avoid vignetting, a photographer using a view camera must ensure that the area remains within the image circle (Adams 1980, 56–57; 151–52; 157–61); a tilt/shift lens or perspective-control lens used on a small- or medium-format camera usually has mechanical limitations that keep the frame area within the image circle.
For the popular 35 mm film format, typical focal lengths of fisheye lenses are 8–10 mm for circular images, and 12–18 mm for diagonal images filling the entire frame. For digital cameras using smaller imagers such as 1/4 in and 1/3 in format CCD or CMOS sensors, the focal length of "miniature" fisheye lenses can be as short as 1–2 mm .
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The portrait is recorded in a circular format in a 1647 etching by Wenceslaus Hollar. [196] An unidentified woman [197] c. 1526 – c. 1528: Black and coloured chalks. 40.5 × 29.2 cm: The identity of the sitter is unknown. [197] Elizabeth Vaux [198] c. 1536