Difference between revisions of "Olympus BH Identification"

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Illuminator
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Page on identifying BH vs BH2
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In general:
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*Parts are mechanically compatible
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**I've seen many Frankenstein systems on the surplus market
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**Mixed parts will "mostly work" but give sub-optimal images
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*Paint
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**BH: silver paint
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***Illuminator, frame
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**BH2: white or black paint
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***Black paint on low end illuminators (BH2-MA, BH2-RLA)
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***White paint on higher end BH2-ULA
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***White paint on observation tube, base
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*Objectives
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**BH: finite
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**BH2: infinity
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***Sometimes Mitutoyo M Plan Apo are also used (with caveats)
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==Illuminator==
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 +
 
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Models:
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*BH-MA
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**Silver paint
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*BH-RLA
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**Silver paint
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*BH2-MA: BF
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**Black paint
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*BH2-RLA: BF, DF
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**Black paint
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**Vs BH2-MA: has "pull BF" knob
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*BH2-UMA
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**White paint
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**High end illuminator
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**Very distinct looking...you won't confuse it with others
 +
 
 +
 
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==Objectives==
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<br />
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<br />
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== Practical information ==
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Designed to do some correction in objective, some in eyepieces
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* Ex: "Olympus NeoSPlan" objective + NFK relay lens
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** Ok
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* Ex: "Olympus NeoSPlan" objective + touptek relay lens
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** Aberration
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* Ex: "Mitutoyo M Plan Apo" objective + touptek relay lens
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** Ok
 +
* Issue: NFK1.67 very expensive for APS-C camera
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** Proposal: use less expensive NFK or eyepiece to do correction and then touptek relay lens for final sizing
 +
 
 +
BH and BH2 are mechanically but not optically compatible
 +
 
 +
* Can use turrets interchangeably
 +
** Ex: use RMS threaded MSPlan on BH2 using BH's turret
 +
* Mixing illuminators will cause aberrations

Latest revision as of 22:17, 18 June 2022

Page on identifying BH vs BH2


In general:

  • Parts are mechanically compatible
    • I've seen many Frankenstein systems on the surplus market
    • Mixed parts will "mostly work" but give sub-optimal images
  • Paint
    • BH: silver paint
      • Illuminator, frame
    • BH2: white or black paint
      • Black paint on low end illuminators (BH2-MA, BH2-RLA)
      • White paint on higher end BH2-ULA
      • White paint on observation tube, base
  • Objectives
    • BH: finite
    • BH2: infinity
      • Sometimes Mitutoyo M Plan Apo are also used (with caveats)

Illuminator

Models:

  • BH-MA
    • Silver paint
  • BH-RLA
    • Silver paint
  • BH2-MA: BF
    • Black paint
  • BH2-RLA: BF, DF
    • Black paint
    • Vs BH2-MA: has "pull BF" knob
  • BH2-UMA
    • White paint
    • High end illuminator
    • Very distinct looking...you won't confuse it with others


Objectives



Practical information

Designed to do some correction in objective, some in eyepieces

  • Ex: "Olympus NeoSPlan" objective + NFK relay lens
    • Ok
  • Ex: "Olympus NeoSPlan" objective + touptek relay lens
    • Aberration
  • Ex: "Mitutoyo M Plan Apo" objective + touptek relay lens
    • Ok
  • Issue: NFK1.67 very expensive for APS-C camera
    • Proposal: use less expensive NFK or eyepiece to do correction and then touptek relay lens for final sizing

BH and BH2 are mechanically but not optically compatible

  • Can use turrets interchangeably
    • Ex: use RMS threaded MSPlan on BH2 using BH's turret
  • Mixing illuminators will cause aberrations