Choice of Lens
Generally a manufacturer will increase the narrow-angle end of the zoom range as the zoom ratio is increased, e.g. 12 × 9, 14 × 9, 17 × 9. It may seem that the best lens to go for would be the 17×9; however, the larger the ratio, the larger the lens and the greater the cost and weight factor. Large ratio zooms are more useful for outside broadcast work than studio but difficult to hand-hold at the narrow-angle end of the range. The weight of the lens is also a factor to consider for hand-held cameras.
Ultra-wide angle zoom lenses are available, but with restricted ratio, typically 8×6, this has a maximum angle of view of 72.5° and a short minimum object distance (0.3 m).
Minimum object distance
A zoom lens will have a limit ...
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