Prime, zoom, telephoto or wide angle lens?

On photography forums I see a lot of confusion about what is meant by prime lenses, zoom lenses, and telephoto lenses in particular. A zoom lens is able to change its focal length, i.e. to zoom in and out. This does not necessarily mean that it is a telephoto lens. A prime lens has aContinue reading “Prime, zoom, telephoto or wide angle lens?”

Focal lengths on different formats

Consumer photographic lenses are almost always sold by their focal length when used on a 35mm camera (or full-frame professional DSLR). It’s already confusing enough to work out what their effective focal length is when used on an APS-C sensor (most consumer DSLRs), but since I’ve been getting into medium-format photography it’s even more confusingContinue reading “Focal lengths on different formats”