I have an A-Macro and have used it quite a bit on the 100/2.8
and have also experimented with it on other lenses too.
I don't like it on the 50/3.5 as that lens really is DESIGNED to
be extended instead of suplemented. Flat fielding goes to pot,
and flare increases dramatically. Not a combination I'd
primarily use, but would use it in a pinch. The A-Macro really
is intended to work with slightly longer focal lengeths. I find
it does a good job on my 100/2.8.
I prefer extension to achieve macro, instead of using the screw
on filters. Less flare, sharper image. However, extension
results in loss of light. When it means getting the picture,
I'll lower myself and put the macro filter on.
Tamron and Vivitar both sold a macro/doubler. This device is a
combination 2X multiplier and extension tube. I used to own the
Vivitar and kinda liked it. I sold it in a fit of "prime zuikos
only" rage. Biggest problem with the unit is that it didn't
help bokeh any. Essentially what it did what take the bokeh
characteristics of the lens and just magnify more. In other
words, it didn't turn your 50mm lens into a 100mm lens. It took
the results of your 50mm lens and just magnified it.
Combining extension tubes and multipliers can be a learning
experience. If you use Lens-Multiplier-Extension-Body
combination the multiplier doubles your focal length and the
extension tube causes it to close focus. If you use
Lens-Extension-Multiplier-Body combination, the closeup image is
doubled as explained in the previous paragraph. Unfortunately,
the Vivitar, I had, was of the second type.
LMEB = good bokeh
LEMB = not so good bokeh
As always, SCs are best.
KN
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