I don't do that many macros; not enough to justify a dedicated macro
lens. A practical alternative, especially in the field is a set of
extension tubes.
I have two sets: the 7/14/25 OM auto tubes, and the Vivitar 12/21/36 auto
tubes. The OM tubes are typical high build quality. The Vivitar, while
not OM build quality (the flanges), are quite sturdy (aluminum), very
functional, and their optics easily equal that found in the OM tubes. Yes,
a tube set can be stacked (there are limitations on how many can be stacked
though). IOW, stacking seven or eight tubes is not recommended.
I've used the tubes with the 200/4, 135/2.8, 85/2, 35/2, 24/2 and 18/3.5
Zuiko lenses. The 135/2.8, 85/2 and 18/3.5 have worked exceptionally well
with extension tubes. A tube set is something to consider if you cannot
afford or do not want a dedicated macro lens.
-- John
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