With any Zuiko's with a close focus aberration correction mechanism, they
would be best set for closest focus so the mechanism is brought in to
play.
Since one is generally after increased extension for the purposes of macro,
hence the extension tubes in the first place, it would probably be
sensible to set all lenses to closest focus to maximise the total
extension.
I think depth of field will reduce with extension, in general, but will be
more greatly affected by the aperture used.
Giles
Barry B. Bean wrote:
> Using the extension tubes with a normal (non-macro) lens, should I
> set focus to near or infinity for best results? What affect will this
> have on actual depth of field?
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