Variable close-up lenses screw into the filter mount on front of a normal lens, in the same way as ordinary close-up lenses. However, by turning a ring the power can be changed, and different magnifications achieved. Definition is not as good as that provided by a macro lens or by simple close-up lenses, but at small apertures the results may be adequate for some purposes. Try one out on your camera before buying. There is a slight light loss, but not enough to need compensation.
Camera focus | Attachment focus | Working distance | Subject size | Magnification |
---|---|---|---|---|
infinity | furthest | 490 mm | 390 × 260 mm | 0.09 |
infinity | closest | 95 mm | 126 × 84 mm | 0.29 |
closest | furthest | 160 mm | 141 × 94 mm | 0.26 |
closest | closest | 41 mm | 72 × 48 mm | 0.5 |
Magnification | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 |
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Created 27th December 1997 — Updated 10th April 2001
Copyright © 1987–2001 Alan Wood