PCACala@xxxxxxx wrote:
>
> Hi Bob:
>
> > When would something like this be useful? How much effect will it have
> > and which lenses would be best suited to its use?
>
> The shorter the focal length, the more effective this is in being able to
> focus closer. For example:
>
> 35 mm f/2.0 Zuiko
> 1:5.3 reproduction ratio normally
> 1:4.3 w/ 7 mm tube
>
> 28 mm f/2.8 Zuiko
> 1:6.3 normally
> 1:2.3 w/ 7 mm tube
>
> 24 mm f/2.8 Zuiko
> 1:6 normally
> 1:2 w/ 7 mm tube
>
> But frankly, I can't remember having the desire to focus my wide angles closer
> than normal, so mine is still looking for a reason for its existance. Given
> that it weighs close to that of the 25 mm tube, I'll opt to carry the latter,
> which gets the 50 mm Macros to 1:1 (in a pinch) and offers a bit closer
> focusing with telephoto lenses.
>
> Gary Reese
> Las Vegas, NV
>
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Hi Gary,
Thanks again for the input.
Regards,
-Bob-
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