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www.answers.com/Q/What_is_the_difference_between_using_the_iris_diaphragm_and...

The iris diaphragm controls the amount of light passing through the slide or specimen, while the substage condenser focuses a cone of light on the slice or specimen.

en.wikipedia.org/wiki/Condenser_(microscope)

The Arlow-Abbe condenser is a modified Abbe condenser that replaces the iris diaphragm, filter holder, lamp and lamp optics with a small OLED or LCD digital display unit. The display unit allows for digitally synthesised filters for dark-field, Rheinberg, oblique and dynamic (constantly changing) illumination under direct computer control.

answers.yahoo.com/question/index?qid=20130927144931AANKtDZ

Older microscopes used mirrors to reflect light from an external source up through the bottom of the stage; however, most microscopes now use a low-voltage bulb. Iris diaphragm: Adjusts the amount of light that reaches the specimen. Condenser: Gathers and focuses light from the illuminator onto the specimen being viewed.

blog.microscopeworld.com/2011/09/microscope-condenser-and-aperture.html

The aperture diaphragm (also called an iris diaphragm) controls contrast, and is found in the condenser, which sits right below the stage in line with the microscope objectives. The condenser may be movable, both in the horizontal and vertical directions.

www.answers.com/Q/How_are_the_substage_condenser_and_iris_diaphragm_on_a...

The iris diaphragm controls the amount of light passing through the slide or specimen, while the substage condenser focuses a cone of light on the slice or specimen.

mainewind.org/condenser-vs-iris-diaphragm-no-longer-a-mystery

Condenser Vs Iris Diaphragm Fundamentals Explained. Remove the eyepiece from the most suitable adapter and insert the pin-hole eyepiece so that you may see the condenser. Others are going to swear by an excellent condenser. Some can argue that dynamic microphones are the best way to go.

quizlet.com/48648164/lab-practical-1-microbiology-flash-cards

4. move condenser up - open the iris diaphragm in the light source 5. move stage down and clip slide onto stage 6. click 10x lens into position and while looking directly at the slide, move the stage up as high as it will go being careful not to allow the lens to touch the slide 7. turn voltage regulator for light source up about 3/4 of maximum

www.biologyaspoetry.com/terms/iris_diaphragm.html

In light microscopy the iris diaphragm controls the size of the opening between the specimen and condenser, through which light passes. Closing the iris diaphragm will reduce the amount of illumination of the specimen but increases the amount of contrast.

zeiss-campus.magnet.fsu.edu/tutorials/basics/fielddiaphragm/indexflash.html

The field iris diaphragm, residing in a conjugate plane with the lamp collector lens, is imaged sharply into the same plane as the specimen by the microscope condenser. Images of both the field diaphragm and the specimen are formed in the intermediate image plane by the objective and are projected into the fixed field diaphragm of the eyepiece ...

www.microscope.com/education-center/microscopes-101/compound-microscope-parts

Condenser is used to collect and focus the light from the illuminator on to the specimen. It is located under the stage often in conjunction with an iris diaphragm. Iris Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage.