speed (zn):
The ratio of the focal length to the diameter of a (camera) lens system
f number, focal ratio, speed, stop number
speed (zn):
An amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
chalk, chicken feed, crank, deoxyephedrine, glass, ice, meth, methamphetamine, methamphetamine hydrochloride, methedrine, shabu, trash
Via: Ensyns.nl
Via: Memodata.com
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