CONCERNING AUTO-IRIS LENSES
VR301
DC 
VIDEO
A.I.
LENS
DC type
A lens without amplifier circuit that operates only on a DC power source. In general, this type of lens is referred to as DC type coil lens or DC type
(Set the A.I. LENS switch to the DC position.)
VIDEO type
A lens with amplifier circuit that operates on video signal and DC power source. In general, this type of lens is referred to as EE amplifier type lens.
ALC and LEVEL volume level controls are available on the lens for iris adjustments.
(Set the A.I. LENS switch to the VIDEO position.)
Compatible
1/3 inch Sanyo DC type lens | VIDEO type lens |
Standard angle, f= 9 mm | |
Telephoto angle, f= 12 mm | |
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Greater telephoto angle, f= 16 mm | |
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If using a VIDEO type
•Set the ALC and LEVEL controls on the lens to adjust the iris. Normally the ALC volume should be turned all the way to Av (Average).
•Depending on the type of lens used, the lens may not perform properly. In such a case, adjust the LEVEL volume on the lens casing to correct.
