Vic Fraenckel wrote:
>> But it works a lot better using a 'real' camera with extension
>> tubes on the lens so that you get a better stand off distance.
>
> What are these extension tubes?

Extension tubes move the lens out further from the camera.  This allows for
a closer focusing distance.  Extension tubes do NOT allow the front of the
lens to be farther from the subject, in fact the opposite.


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