iris diaphragm

iris diaphragm Definition

iris diaphragm

noun

a device consisting of thin, overlapping metal blades that can be adjusted to form an aperture of varying size for camera lenses, etc.

iris diaphragm Usage Examples

Converse of object

have: The substage condenser has an iris diaphragm and filter carrier.
close: Perhaps the easiest methods are to offset a partially closed condenser iris diaphragm or the image of the light source.

Noun used with modifier

condenser: Perhaps the easiest methods are to offset a partially closed condenser iris diaphragm or the image of the light source.
substage: Open the substage iris diaphragm fully, since the condenser needs to be operating at maximum aperture.
contrast: It is important that you fully open the contrast iris diaphragm.

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