On 3/15/2018 12:00 PM, JOHN DUGGAN via olympus wrote:
All this talk of Macro/Micro has prodded me into resurrecting an old project. I
recently discovered an old 20mm f3.5 macro lens I had forgotten about.
!!! :-)
I also have 135mm and 80mm lens heads, bellows, auto telescoping extension tubes,
focussing rails, 2 T10 ring flashes and a pair of T28 flashes. (and a digital 60mm
Macro lens)I am trying to build a trans illuminator base using the base of an old
microscope with my macrophoto stand on top. My idea is that using a
transilluminator which has been converted to a 3w cree LED. and a tiltable flat
mirror in the base housing i should be able to get reasonable illumination. Another
option is a high power LED mounted in the base firing directly upwards.Any (helpful)
suggestions gratefully received!
I tried explaining my solution in words. Perhaps a pic is worth more.
<http://zone-10.com/tope2/main.php?g2_itemId=22751>
This is almost infinitely simpler, and oh so much easier to use than what you describe. Dead cheap. Daylight balanced;
anyone wanting something else may lay a Wratten gel on the light.
Also, I've intentionally showed it with the 65-116 tube mounted. Unlike the bellows, it doesn't line up with the stage
hole, but with this light source, it doesn't matter. Quicker and easier for some uses than the whole bellows.
Does anyone have info on Leiberkulm reflectors regarding the radius of the
reflecting surface. It should be straightforward to machine in white plastic
or aluminium given this dimension.
I just ordered one of these.
<https://www.shapeways.com/product/58PBZMAMX/lieberkuhn-reflector-49mm-lens-diameter-f-35mm?optionId=42281834> From my
reading, the 35 mm FL may be too short, when mounted on the recessed threads Oly 20 and 38 mm lenses, but it seems a
simple way to get started. (BTW, Oly said the tapered shape of these lenses, which is what forces the threads back, is
intentional, to make subject lighting easier.)
I'm pretty sure I saw reflector FLs of 20 mm and 35 mm for these lenses when mounted at the front, but I read so much
stuff I don't recall where. I didn't find out what the FLs of the Oly originals are.
Parabolic Moose
--
What if the Hokey Pokey *IS* what it's all about?
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