The 50/3.5 is an very good lens in general and just excellent for flat
field copy work. I don't particularly like it for outdoor close-up/macro
work for a couple of reasons. First, the working distance is just too
close for comfort for me. Second, its bokeh is generally poorer than
other, longer fl lenses I have.
A 25mm extension tube will pick up at 1:2, where the built-in focusing
stops, and continue through 1:1, thus giving complete coverage from
infinity to 1:1 with one lens and one tube. Depending on what
magnification range you like, a shorter tube may cover everything in the
flower range with one combo. Personally, I very seldom use 1:1 and often
find 1:2 inadequate, so I would probably find something like a 14mm
pretty general purpose for flower pics. Get auto tube(s) unless you have
superhuman patience and concentration. By this time, this is old memory
and theory for me, as I mostly use the 135/4.5 and Kiron 105/2.8 1:1 macro.
As a 50mm lens faster than f5.6, any of the standard focusing screens
are appropriate. choices between them tend to be personal preferrence.
The varimagni magnifies the viewfinder image. If that helps your
focussing, it can be useful. It can also help with steadiness with
lighter tripods, as less extension is needed.
Moose
Andy Gilbert wrote:
A few questions now: 1) Is it worth buying extension tubes as well (Zuiko),
is a set helpful or is one particular size of most use? 2) What other
subjects should I try, other than flowers (though I would prefer to keep it
simple & not use flash-unless someone can persuade me otherwise!) 3) What is
the best focussing screen to use, & would the varimagnifinder help-I do have
one.
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