All photos belong to the product to be sent. There are no c-mount threaded.  Adapter needs to be used to connect it. There is also a macro mode.

This Schneider Varoigon is a varifocal 10 mm to 100 mm f/1.8 designed for the ultimate in industrial accuracy. Schneider's reputation for advanced glass composition and lens coatings result in the truest image reproduction possible. It being a variable focal length lens allows the lens to be moved from job to job or simply alter the field of view. The variable rings for focus and aperture can be locked down with set-screws to assure consistent operation.

Ultimate Optical Performance
The Variogon 10 to 100 mm will focus down to about 3 feet, 1 meter actually. The lens will resolve images for machine vision, robotics or any scientific application using a C-mount camera.
MountC-Mount
Image Format2/3-Inch CCD
Focal Length10 mm to 100 mm Varifocal
Aperturef/1.8 to f/16
Iris TypeManual with Set-Screw
Focus TypeManual with Set-Screw
Horizontal View AngleWidest -10 mm
46° Horizontal
35° Vertical
Longest -100 mm
5° Horizontal
3.8° Vertical
Minimum Object Distance (M.O.D.)3.3 Feet
1.0 Meters
MacroYes
Dimensions3.2 x 3.2 x 6.2 Inches
80 x 80 x 160 mm
77 mm Filter Screw
Weight2.3 Lbs.
1040 g