The substage condenser must have a continuously variable circular aperture diaphragm
(A stop) and be capable of true Kohler illumination for the full spectral range of 350 to 950 nm.
In addition, newly adopted 9-blade aperture diaphragm
help produce bokeh with a smooth, circular shape.
Distortion is small in lenses with constructions symmetrically configured on both sides of the aperture diaphragm
, but is likely to occur in lenses having asymmetrical configurations.
Each Canon Cinema lens is equipped with an odd-numbered 11-blade aperture diaphragm
, which is ideally suited to achieve creative depth-of-field manipulation and pleasing "bokeh" effects of cinematographic quality.
The lens features a nine-blade curved aperture diaphragm
to provide beautiful, blurred backgrounds even at full-zoom range.
Seven-blade aperture diaphragm
that helps to create smooth and round bokeh effects.
A circular aperture diaphragm
that produces an attractive smoothness in out-of-focus areas.
The LM and LV series feature two precision photo-etched measuring lines, changeable field and aperture diaphragm
, and dual leafspring indenter supports for centered indentations, greater accuracy and excellent repeatability.
Each lens is equipped with a newly designed 11-blade aperture diaphragm
for soft, attractive blur characteristics, making them ideally suited for cinematographic applications.
Nikon's AZ100 Multizoom microscope has a zoom aperture diaphragm
located at the back focal plan of the objectives lens resulting in a consistent telecentric image across the entire zoom range.
The illuminator changeover turret and aperture diaphragm
, as well as the illuminator voltage control, have all been motorized for accurate reproduction of illumination so images can be captured using consistent illumination.
2L II USM lens offers high-speed manual focus, distance encoding for E-TTL II flash, and a circular aperture diaphragm
that improves the appearance of background areas.