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
The Heart Never Lies Singles Chart, being beaten by Take That's "Rule the World"' which charted at number two, and Leona Lewis' "Bleeding Love", which debuted at number one. Although "The Heart Never Lies" debuted at number three, it sold 9,000 more copies than their last number one hit "Baby's Coming Back" did in its first week (40,000 against 31,000). "The Heart Never Lies" also reached number sixteen in Ireland. "The Heart Never Lies" was played for the first time at V Festival on 18 August 2007. The band also performed the song at the Blackpool Illuminations on 31 August 2007. The performance was