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The effect increases with the diopter number and the focal length of the lens. For shorter focal lengths in digital photography stronger close-up lenses are therefore recommended. The image scale describes the effect. A scale of 1 : 3 renders an object at a third of its original size on the film/sensor. Close-up and macro lenses are simple aids which are suitable in particular for three-dimensional objects (flowers) and pictorial photography, less for technical reproduction purposes. Sufficient stopping down increases the sharpness and the depth of field.
As clearly illustrated, the stronger the close-up lens, the closer you can get to the subject with the same distance setting and the larger the image you can obtain. A longer exposure time is not necessary. B+W close-up lenses can be combined, but for quality reasons and to prevent vignetting no more than two lenses should be mounted over each other. The values are simply added together.
- Especially useful for simple close-ups
- Fascinating shots of flowers, insects, and small objects
- Suitable for analog and digital cameras
- Low-cost, straightforward entry to close-up photography
Questions & Answers
B+W Filters 40.5mm Close Up Lens NL4
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