dosk wrote:
>
>
> Okay, so what is an extension tube, exactly?
> And what does it do for you?
It's a tube you stick in between your lens and camera. Looks like an
empty extension tube.
It allows you to focus closer...take a look at one of your lenses, and
turn the focus ring from infinity all the way to it's minimum focus
distance. You'll see the barrel moves away from the camera (assuming
it's not an IF lens). A tube lets you stick it out a bit further.
Focusing closer gives you higher magnification.
They're a cheap alternative to a macro lens, or a way to get some lenses
that have poor min. focusing distances to focus closer.
tv
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