Lenses

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are essentially any lenses with a focal length of up to 35mm.

Wide-Angle Lenses

are generally between 35-50mm and tend to most closely represent space the way the human eye sees it.

Standard Lenses

generally fall into the range of 60-100mm and are generally not a type you'll want as a prime unless you have a specific purpose in mind (so

Medium Lenses

are what you want for zooming in really far.

Telephoto Lenses

anything over 400mm is considered an

Ultra Telephoto Lenses