JOU 3355 Lecture Notes - Lecture 3: Zoom Lens, Full Frame, Fisheye Lens
21 Mar 2017
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Document Summary
Focal length = angle of view and magnification. A measurement from the midpoint of that lens to the sensor is 50mm. The longer lenses (telephoto lenses) take a distant object and magnify them. Gives you shallow depth of field (background out of focus) The shorter lenses (wide angle lenses) encompass a wider angle of view. Shorter focal length (mm), the wider angle of view. Good for encompassing a lot within in the frame. Deeper depth of field (background sharp too) Tend to distort the field of view (curvature at edge of frame) Standard (prime) 50mm lenses are single focal-length. Prime lens = no zoom (you have to physically move) Up-close shots are best with macro lenses. Fisheye lenses can be either circular or full-frame. Full-frame fisheye is corrected to fill the whole frame. Superzoom lens are typically 18-200mm or 18-300mm. Most likely 50mm or 100mm or you may have a macro setting on your zoom lens.
