OK, here's the definitive answer:
"Maximum subject magnifications are 0.43X with the Telescopic Auto Tube
and Life Size with the bellows."
Also:
"The optimum subject magnification for this lens is 1/5 life size, but
this allows it to produce excellent image quality as high as 1/2 life
size as well as very acceptable pictures at infinity."
Source: The OM System Lens Handbook
George
Chip Stratton wrote:
>
> >
> > I believe the 135/4.5 macro goes to 1:0.43 with the auto extension
> > tube.
>
> The manual for the telescopic extension tube says maximum reproduction ratio
> with the 135/4.5 is 1:2.6.
>
> Naturally, one can put it on the bellows and get more extension and a higher
> reproduction ratio.
>
>
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