User Guide

490 Series Microscope
AmScope Proprietary Page 34 of 64
2.21.2 Installing the Turret Phase Contrast Kit
1. Loosen the lock screw and remove the Abbe
brightfield condenser from the holder.
2. Insert the phase contrast condenser turret
into the condenser holder and tighten the lock
screw with the screw driver. Due to the
weight of the turret, it’s best to use the screw
driver to securely fasten the turret to the
condenser holder.
2.21.3 Focusing the Turret Phase Contrast Kit
1. Rotate the microscope’s nosepiece to the 10X
phase contrast objective lens. Objective
lenses designed for phase contrast will be
marked “Ph”, this denotes the objective lens
has a built-in phase ring.
Note: There are 4 phase contrast objectives:
10X, 20X, 40X and 100X, and there are 5
settings on the condenser’s turret ring: 10, 20,
40, 100 and B. The numbers on the turret ring
must always correspond with objective’s
numbers.
For example, when using a 10X phase contrast
objective the condenser’s turret ring setting
must be 10. The B setting will make the phase
contrast condenser work as a conventional
brightfield condenser.