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Sequence viewing > Index - Cameras - lenses - optics - Resource - ©
Lloyd Godman
Film - Digital
How
does focal length affect the close focus distance of a lens?
Like all lenses, longer focal length lenses have the ability to focus to infinity, but
as the focal length increases the closest focusing distance
decreases dramatically. The chart below gives an approximation
of these distances.
Focal
length of lens
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Standard
closest focusing distance
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20mm
wide angle
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6
inches - 0.15m
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28mm
wide angle
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1
ft - 0.3m
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50mm
(standard lens on 35mm camera)
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2ft
- 0.6 m
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135mm
small telephoto
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5ft
- 1.5m
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400mm
telephoto
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25ft
- 8 m
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600mm
telephoto
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33ft
-10m
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What
is a macro lens?
What
is a Zoom lens?
Want to learn more? - do a workshop or one on one with Lloyd Godman
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