What do the inscriptions C or K or WF or H on the eyepiece mean?
C or k identify a compensating eyepiece. Some microscope objectives do not include correction for lateral chromatic aberration. For such objectives (Olympus LB series), the compensating eyepiece completes the correction. WF means widefield; more of the specimen to be seen at a given time. H signifies high eyepoint which means that the user’s eyes do not have to be placed very close to the top lens of the eyepiece during observation; a particular boon to eyeglass wearers. Question 19. Why do some observation tubes have notches cut into them. Answer: The notch is meant for placement of the projecting “locator” pin on eyepieces which have a reticle installed. Such an eyepiece can be focused by rotating its diopter adjust upper lens, while the “locator” pin keeps the reticle (e.g. crosshairs or micrometer scale) properly oriented.
C or k identify a compensating eyepiece. Some microscope objectives do not include correction for lateral chromatic aberration. For such objectives (Olympus LB series), the compensating eyepiece completes the correction. WF means widefield; more of the specimen to be seen at a given time. H signifies high eyepoint which means that the user’s eyes do not have to be placed very close to the top lens of the eyepiece during observation; a particular boon to eyeglass wearers. • Why do some observation tubes have notches cut into them. The notch is meant for placement of the projecting “locator” pin on eyepieces which have a reticle installed. Such an eyepiece can be focused by rotating its diopter adjust upper lens, while the “locator” pin keeps the reticle (e.g. crosshairs or micrometer scale) properly oriented.
