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Nikon microscopes

While my first microscopes were American Optical Series 10s (cheap and plentiful in the U.S.),
they were also interesting because AO pioneered diascopic infinity objectives.
That did not preclude also acquiring a Nikon Apophot,
which used Nikon's highly popular Model S optics.

That Apophot was too large to move from KY, instead using AO/Reichert microscopes
until concluding that:
  • their episcopic illumination was "not ideal"
  • larger than RMS objectives are wanted for sharp darkfield epi
  • fewer old optics in paths to camera sensors benefit contrast and sharpness.

    210mm tube length

    Interest in Nikon 210mm objectives was motivated by
  • macro photographers using CF M Plan objectives
  • relatively low cost and wide availability of Nikon EPI microscopes with CF BD Plan objectives
        having M26x0.75 threads:
        Comparable Mitutoyo objectives have M26x0.706 threads (36TPI, same as RMS).
  • Beware of incompatible M26x1 (robot lens) and M26x0.5
        (Roedenstock Schneider enlarger lens shutter) threads...

    While Nikon's newer infinity objectives are more highly rated,
    they are also significantly more expensive, since still current technology.
    Obvious frames for 210 BD objectives are Nikon's Optiphots,
    which are more capable than contemporary Labophots with only RMS objective turrets,
    although all are notorious for fragile plastic fine focus gears.
    Optiphot frames come in 4 flavors:
  • IC inspection ( -66, -77, -88 100 and 150), of which 100 and 150 uses infinity optics
  • Optiphot-2, with 100W illumination
  • Optiphot(-1), using less plastic than Optiphot-2, but also 50W instead of 100W illumination
        Although vertical illuminators are often installed on Optiphot-1 and -2,
        IC inspection frames have XY stages with more space for examining opaque objects.
  • Optiphot-200 and -300, which (like 150) use infinity objectives on frames more similar to Eclipse
    ELWD 0.3 Condenser
    Phase Contrast
    Phase Contrast-2 ELWD 0.3 turret as Dark Field Turret
    Swing out
    Labophot 1
    LED conversion
    Metaphot, first CF 210mm tube length microscope
    Optiphot 1
    Optiphot 66
    Base illumination
    Diascopic conversion
    Questions - Sure Squintsalot:
      Part 1: polarizing
      Part 2: fine focus, base
    Optiphot-66 DIC
    Photo relay lenses
    Stages and crossed roller bearing rails
    Trinocular heads
    Vertical Illuminators

    Nikon Optiphot Series Microscopes -
    Mike Tuell
    Optiphot-66/77/88 | Nikon Multiphot system -