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MC3820 and MC5720 Cameras Installation Instructions
LENS SELECTION
Suitable lens types are C and CS mount in fixed iris, manual iris, auto-iris or direct drive versions.
Sizes are shown below. Cameras are factory set for CS mount lenses. If using a C mount lens,
rotate either of the back focus screws approximately 30 turns counterclockwise before installing
the lens.
Lens size
1/3"
1/2"
2/3"
1"
MC3820-3
MC3820-2X
MC5720-3
MC5720-2X
LENS SETUP PROCEDURES
For manual or fixed iris lenses set the EI switch to ON.
Auto-Iris Lenses
Switch the EI OFF. Refer to the lens instructions and adjust the lens for the optimum picture (video
output level of 1V peak-to-peak).
Direct Drive Lenses
Switch the EI OFF. Use an appropriate screwdriver to turn the lens level potentiometer (under the
hinged flap) fully clockwise. Next, slowly adjust the potentiometer counterclockwise until the optimum
picture is obtained (video output level of 1V peak-to-peak).
FOCUS ADJUSTMENT
The back focus adjustment screws are located on the top and side of the case at the front of the
camera and should be adjusted using an appropriate screwdriver. Do not over turn the back focus
mechanism.
Fixed Lenses
Set the lens focus to infinity and view an image greater than 6.5 feet (2 m) away. Focus the image
using the back focus screw. Set the lens focus as required.
Manual Iris Lenses
Open the iris fully and set the lens focus to infinity. View an image greater than 6.5 feet (2 m) away.
Focus the image using the back focus screw. Set the lens focus and iris as required.
Auto-Iris and Direct Drive Lenses
Fully open the iris by covering the lens with a suitable neutral density (ND) filter. Set the lens focus
to infinity. View an image greater than 6.5 feet (2 m) away. Focus the image using the back focus
screw. Remove the ND filter and set the lens focus as required.
