Lens Classes
Definition
Wide-angle (under 35mm full-frame) for overviews, normal (50mm) for mid-range, macro (1:1 or closer) for close-ups, telephoto for surveillance and exterior contexts.
- Wide-angle
- Under 35mm full-frame, overview shots
- Normal
- 50mm, mid-range shots
- Macro
- 1:1 or closer, close-ups
- Telephoto
- Surveillance and exterior contexts
Common questions
Why does a scene photographer need more than one lens class?+
Different documentation goals need different fields of view and magnification: a wide-angle lens captures spatial relationships across a whole room, while a macro lens is needed to resolve fine detail on small items like tool marks or fibres, which a wide or normal lens cannot render sharply.
What distinguishes a macro lens from a normal lens at close range?+
Macro lenses are optically designed to hold focus and minimise distortion at very close working distances, typically achieving a 1:1 reproduction ratio where the subject appears life-size on the sensor, which normal lenses generally cannot achieve without extension accessories.
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- Three-Shot Rule
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