This is New Semi-apo  Plan Fluor objectives 

Product introduction and parameter

1.  Apply for microscope of infinite corrected optical system with tube lens FL 180mm, such as Olympus optical system.

 2..  DIN 45mm standard

3.  20x, 40x and 100x objectives have spring-loaded(retractable) front ends.

4.  All design of objectives’ shell allowed to be OEM as your preference.