Got an optics question I cannot answer without your guys help. In the Zeiss Optical Systems guide which can be found at:
https://www.science-info.net/docs/zeiss ... ystems.pdf
on pg. 89 for Z-type condensers (of which I both a flip top 0.9 NA and an ach-apl 1.4 NA) it begins with this statement:
Z-type condensers
For the condenser carrier of our routine and research microscopes, parfocalized for a distance of 38.2 mm, with built-in aperture iris diaphragm for bright field.
What does this mean?
Thanks in advance for your consideration!
Glenn
Condenser parfocality
Re: Condenser parfocality
The distance from the upper plane of the condenser carrier to the condensers focal point is 38.2 mm. Later Zeiss microscopes used 40 mm instead. The condensers look the same and fit into the carrier but are not compatible.