Wrote John Gaasland:
>Thanks Chris. What is a reversing ring? John.
A reversing ring bayonets into the camera body (or into an
intermediate extension ring, bellows etc.) while its front end
has a thread for the filter thread of the lens, which is thus
monted backwards (reversed). This is a classic macro trick.
General use lenses are optically optimized for a subject-lens
distance which is considerably larger than the focal length
(roughly lens-film distance). When these proportions are
upset, performance is degraded. By reversing the lens,
you can still have a larger distance in 'front' of the lens thjan
'behind' it. Catch my meaning?
With a reversing ring and the appropriate thread adapters,
you can even mount a reversed enlarger lens. Good enlarger
lenses, such as the EL-Nikkors, are very good macro lenses.
By necessity, they must have flat field and excellent edge
sharpness, and they are optimized for close range from the
beginning.
Hälsningar/Regards
Lars Bergquist
Timberwolf Type, the independent
specialist in text typefaces - visit me at
<http://www.timberwolf.a.se/>
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