Macro photography can be a lot of fun,
but lenses are quite a large investment for such a specific genre.
No fear, macro extension tubes can convert any lens into macro lens
for a fraction of the cost!
Extension tubes work by putting
additional space between your lens and the sensor or negative.
However, depending on the focus range of the lens, you may not be able to
focus to infinity or anywhere near it—you will only be able to focus within a few inches of your subject. But that's the ok, 'cause you're doing macro
photography.
Also, be warned that the cheapest extension tubes (which I purchased) cannot communicate electronically
between the lens and the camera body. I thought this would be ok
when I bought the tube, figuring on trial and error to come up with
the proper exposure. I neglected to take into account that I would
not be able to control aperture—meaning every shot will be taken at
its widest aperture. At such a close distance you're going to have
only smallest sliver of focus to work with.
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