supports the body tube and is the part to grasp when carrying the

microscope.

connects the ocular lens with the nosepiece housing the objective

lenses.

rotating part to which the three objective lenses are attached.

lenses that magnify the images by the power shown on the side of the

objective lens: low-power (4X, 10X), high-dry (40X), and oil-immersion (100X).

Ocular lens

lens that magnifies the real image another ten times.

Stage

supports the microscope slide, which is held on to the _____ by a slide

holder.  

-Contains an opening that allows incident light shine through to

the specimen.

a lens located directly below the microscope stage that concentrates

the light before it passes through the specimen. There is a knob that can raise or

lower the condenser.

Iris diaphragm (Condenser Aperture)

an opening on the bottom of the

condenser that regulates the amount of light entering the condenser. A lever

moves back and forth to regulate the size of the opening.

Coarse adjustment

a rotating knob that moves the body tube up or down to bring the specimen into initial focus.

This knob is used only with the 4X and 10X

objectives. With the high-dry (40X) and oil immersion (100X) objectives, there is

a danger of driving the objectives through the slide.

Fine adjustment

a smaller rotating knob that brings the specimen

into final focus by moving the body

tube more slowly. As the objective lenses are

parfocal, only the fine adjustment knob needs

to be used after you have focused with the

low-power objective.

Parfocal - lenses

are arranged such that after focusing with

one objective; the image will remain in focus when moving to another objective

Light passes through a condenser modified with a dark field stop; light goes around a specimen

allows you to distinguish 2 points that are close to one another