I'm sure you meant well but after reading this article there must be a logical reason that the laboratory have used Zeiss eyepieces.
https://microscopyofnature.com/right-co ... d-eyepiece
Conclusion
Combinations of objectives and eyepieces from the same manufacturer do not always give the best results. Especially with plain achromats, it is recommended to experiment a bit. To get the best out of achromats, different eyepieces are required. Higher power achromats need compensation whereas low power achromats do not or need less correction. The proper objective-eyepiece combination is best determined experimentally and by critically assessing the microscopic image with suitable test slides.
Fair, for nearly every rule there is an exception. Rolf Vossen is a master of experimentation and often challenges common “Internet” knowledge. He even combines parts of 2 Zeiss eyepieces to achieve a photo projection eyepiece with excellent results.
I learned a lot reading his website and exchanging mails.
Long time Olympus user here (recently changed my 2 E-series scopes and the BH to a bit more modern BH2), the HSC is still in use as a field scope.
WITHIN my recommended “same era - same brand” eyepiece & objective combination there is already sufficient complexity.
In the era of Olympus E, G and F type scopes Olympus supplied 2 or even 3 sets of eyepieces as “standard” with each scope:
* simple correction Huygens type for the lower power objectives,
* P marked objectives with color correction for observation, projection and photo
* the WF series with correction for wide field the higher power and fluor / Apo corrected objectives.
* the FK photo projection eyepiece was a late addition to the series
From the Olympus documentation:
H. R: are particularly effective when used in combination with low power objectives.
P denotes eyepieces which compensate for chromatic aberration and distortion of the objectives.
K signifies eyepieces that are corrected for chromatic aberration of the objectives and that are particularly effective when used in concert with high·power objectives or Fl objectives.
W. F: denotes eyepieces with high exit pupil providing a large and flat field of view use of these eyepieces enable the microscopists to see the edge of the field with the ir eyeglasses on . Bi indicates eyepieces for use on binocular tube.
Have only limited experience using the Zeiss scopes of that era, there were similar series of compensation eyepieces as well.