There are many lenses geared toward specific looks and uses, from the telephoto lenses to the super-wide fisheye. Next comes the practical, and the practice. It’s all about combining knowledge of your tools with trial, error, and experience. But, in practice, an understanding of how focal length and aperture work together, combined with the type of photography you want to capture, will guide you in focal length–based decisions. You can also determine focal length by measuring the distance at which a lens focuses on a distant source (or by using a tool called an optical bench). An online focal length calculator can help you make these calculations. This information will change your focal length calculation. A convex lens (also known as a converging lens) and a concave lens (also called a diverging lens) focus light at different points. You also need to understand if your lens is concave or convex to determine focal length. You can do this with a simple formula, but first you need to know the estimated distance from you to your subject and from your lens to your camera sensor.įocal length = the distance from the subject to the lens + the distance from the lens to the camera sensor To best capture a specific subject, whether it’s far away or up close, you need to determine the focal length. “Optical focal length is described typically in millimeters, and basically it determines how wide or tight your shot is.” That’s just cropping your photo before you actually take it,” photographer Derek Boyd points out. The CAF World Cup qualifiers will resume in May 2021, after the postponed 2020 AFCON finals which start in January.“You can zoom in on your phone, but that’s not changing your focal length.
Qualifying for the 2021 Africa Cup of Nations, which has been postponed until January 2022, will resume in the November international break. CONCACAF and African countries will play international friendlies in October, in some cases their first international fixtures of 2020. World Cup qualifying will resume in South America and Asia in October, but CONCACAF has decided not to begin its qualifying schedule until the March international break. England, for example, will play a friendly match with Wales as well as their Nations League clashes with Belgium and Denmark. The October and November international breaks were extended by an extra day for UEFA countries to allow teams to play three games rather than the usual two. Some of the more notable results saw both France and Portugal thrash Croatia, Italy win away at the Netherlands, Germany draw 1-1 with Spain, and England scrape past Iceland with a last-minute Raheem Sterling penalty. The first two matchdays of the UEFA Nations League went ahead in September. Which international tournaments are being played in 2020-21? The September international break has already passed, but there were no fixtures played outside of Europe.įIFA’s coronavirus response included the cancellation of the September international window for the AFC, CAF, CONCACAF and the OFC.ĬONMEBOL countries had been slated to begin their World Cup qualifying campaigns but these fixtures were eventually cancelled. There are four international breaks planned for the 2020-21 season, scheduled around the following weekends: When are the 2020-21 season international breaks?