IT.OHNAR
automatic Extension Tubes
The most versatile tool for macro work is a set of 3 extension
tubes.
Place them between the camera body and prime Lens, have a
diaphragm setting as low as possible if you are working without
flash, and combine it with a long exposure time. For flash
shots the diaphragm setting has to be correspondingly greater
compared with values calculated from the Guide number and
distance. Computer flash units require another calculation.
Use tubes individually or together for maximum magnification.
The following table will help work out the multiplication
factor using a standard 50mm lens.
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