Hi all -
Me again! ;-) I understand (I think) that a non-optical extension
tube just allows you to focus closer to the subject. I see that Canon
makes the following: an EF-12; EF25; and and a Variable EF15-25
extension tube.
Would someone be so kind as to briefly describe the virtues of each?
I'm assuming that the EF-25 allows you to get twice as close as the
EF-12? Probably also with an equivalent loss of light.
If there is a FAQ or an article about this somewhere, please direct
me. There's no needs to use bandwidth for this if so.
Thanks much
Ken
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