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Message: <blockquote data-quote="Dysfunction" data-source="post: 1303555" data-attributes="member: 51052"><p>Tubes do work well, they don't use glass and so they don't degrade image quality (they create a larger ratio by moving the lens farther away from the focal plane).  That said, they do so at the loss of some light (and thus speed), and the depth of field is far narrower.  Also harder to focus.  Bellows are much easier to use in that regard (almost impossible to find now though) and in some ways are the ultimate in this type of macro device, assuming you're working in a controlled environment (read studio).  I have a couple sets of tubes and no macro lenses.  Of course, I'm not really a macro kind of guy... so the tubes work well for the occasional time I need to use them.</p></blockquote><p></p>