F-number lengths. Therefore, reduced–depth-of-field effects will require smaller f-numbers when using small-format cameras than when using larger-format cameras. Image sharpness is related to f/number through two different optical effects: aberration, due to imperfect lens design, and diffraction which is due to the wave nature of light. The blur optimal f-stop varies with the lens design. For modern standard lenses having 6 or 7 elements, the sharpest image is often obtained around 5.6–8, while for older standard lenses having only 4 elements (Tessar formula) stopping to 11 will give the sharpest image. The larger number of elements in modern lenses allow the
Opposite Worlds Opposite Worlds Opposite Worlds is an American reality game show that originally aired on the cable channel Syfy. The show premiered on January 21, 2014 and aired on Tuesdays and Wednesdays, with the latter being a live elimination episode. The format of the show is based on the successful Chilean series "Mundos Opuestos" which aired from 2012 to 2013 on the cable channel Canal 13. The series revolves around a group of strangers living in a house that is divided by a "future" and "past" theme. The contestants are divided into two teams, and compete in weekly challenges to determine