Fast lens

A lens that has a wider maximum aperture than is usual for that particular focal length or zoom range (such as a Canon EF 50mm f/1.8 lens), allowing a shorter shutter speed. Fast lenses are not only useful in low light, by using a larger aperture they can be invaluable for throwing backgrounds out of focus to a greater extent than usual.

Overall light or dark subjects (which can sometimes fool the camera’s metering system) can be manually corrected by using exposure compensation settings manually adjusted in fractional f-stops +1 Stop ev

STANDARD ev