This is description of this part:
Bottom, cemented, plano-convex lens of the Carl Zeiss Jena GF-Pw 10x (25) microscope eyepiece, used mainly in Carl Zeiss Jena Jenamed / Jenaval microscopes and similar ones.
The most important thing: this is not a complete microscope eyepiece. This is a service part - a component for repairing the eyepiece.
Position of the lens: this is the last lens of the microscope eyepiece counting from the top, called the field lens
Design: this is a cemented lens, flat on one side and convex on the other
Matching eyepiece: this is a lens from the Carl Zeiss Jena GF-Pw 10x (25) eyepiece with a 30 mm mounting diameter
This lens is not a spare part for a microscope. It is a part for repairing a microscope eyepiece - and that eyepiece can be used in various microscopes, even ones from manufacturers other than Carl Zeiss Jena.
Replacing the last lens in the GF-Pw 10x eyepiece can solve, among other things, the following problems:
- if this lens has cracked or chipped as a result of an impact
- if this lens has come apart into two pieces because the cement has crumbled away over the years
- if the cement joining the two parts of this lens has turned yellow over the years and this affects comfortable work
- if the surface of this lens or the cemented joint has been destroyed by fungus
- if "spider webs" have appeared at the cemented joint, meaning delamination has occurred
A few microscopes that such an eyepiece can be used with are listed in the "compatibility" section, but that is definitely not a complete list. You can assume that the Carl Zeiss Jena GF-Pw 10x (25) eyepiece can be used with any microscope from any manufacturer whose microscope head has 30 mm eyepiece tubes.
What is this part needed for?
- if the bottom lens of the Carl Zeiss Jena GF-Pw 10x (25) eyepiece is damaged, for example scratched, cracked or chipped
- if the cement between the two parts of this lens (because it is a cemented lens) has discoloured or the two lens elements have started to separate
