Entertainment / Photography / Lens Speed: Largest lens opening (smallest f-number) at which a lens can be set. A fast lens transmits more light and has a larger opening than a slow lens. Determined by the maximum aperture of the lens in relation to its focal length. The speed of a lens is relative to it's focal length. A 400 mm lens with a maximum aperture of f/3.5 is considered extremely fast, while a 28mm f/3.5 lens is thought to be relatively slow.
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Speed Adjective Synonyms: hasten, make haste, hurry, rush, charge, dart, bolt, shoot, run, race, sprint, fly, streak, scurry, tear, hustle, scramble, scamper, career, bowl along, go or fly like the wind, go hell for leather, go like a bat out of hell, belt along, step on it
Speed Noun Synonyms: rapidity, fleetness, quickness, speediness, swiftness, velocity, dispatch or despatch, hurry, hurriedness, haste, hastiness, celerity, alacrity, expeditiousness, expedition, briskness, promptness, timeliness, suddenness, precipitateness, precipitousness,
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Entertainment / Photography / Reflex Lens: Alternative term for mirror lens. MORE
Technology / Digital Cameras / Shutter Speed: The speed at which a digital camera's shutter exposes the image sensor to light. A shutter speed of 1/60 means that the sensor is exposed to light for 1/60th of a second. Faster shutter speeds are goo MORE
Entertainment / Photography / Process Lens: Lens system designed specifically for high quality copying. MORE