T720 Series Microscope
AmScope Proprietary Page 20 of 46
2.16 Using a Dry Darkfield Condenser Lens (Optional Accessory)
2.16.1 Using the Dry Darkfield Condenser
1. The first step is centering the condenser. Move the 10X objective lens into the
light path.
2. Remove an eyepiece and look through the empty
eye tube, to see the condenser’s image directly.
3. Use the condenser lens adjustment
knob to adjust the height of the
condenser until the opaque disc is
slightly smaller than the entire image
circle, leaving a ring of light.
4. Turn the condenser’s centering screws to move the
dark spot to the center.
5. Replace the eyepieces.
6. Raise the condenser to the top of its range, just short
of the slide on the stage. The is the optimal position
for darkfield viewing, but can be adjusted later, if necessary.
7. Place a slide on the stage and focus. Adjust
the height of the stage up or down slightly for
optimal viewing, but the condenser lens
should be relatively close to the slide.
8. If you are using a variable numerical
aperture objective lens, adjust the ring at
the bottom to fine tune the darkfield.
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