Ernst Leitz (Firm) · Wetzlar : Ernst Leitz · leaf 24
f the cylinder iris diaphragm is accomplishedby means of a lever. Before the condenser is swung back intoposition the cylinder iris should be opened to its fullest extent. — 21 — The lower iris diaphragm is for use in connection with the con-denser only. It is regulated by means of a small knob. A… … Abbes Illuminating Apparatus for Stand I. Swing-out Condenser.Cylinder Iris Diaphragm. of the object is assured. Ground or colored glass discs may be inser-ted above the iris diaphragm if modification of the light is desired.This illuminating apparatus may also be fitted to Stands laand lb. 22 b.…
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