Theia SL940M varifocal lens
Theia SL940M lens drawing

Theia SL940M 9-40mm CS-mount 1/2.5" F1.5-C 5MP manual iris varifocal lens

Regular price £260.00 £230.00 Sale

The Theia Technologies SL940M 5 Megapixel 9-40mm CS-mount varifocal lens achieves a 30-7.1° telephoto horizontal angle of view on a 1/3” sensor.  It is suitable for camera sensors up to 1/2.5" and has a manual iris range from F1.5 - Closed.

The superior quality of this lens combines stunning performance with the highest build quality and will support sensor technology up to 5 megapixels resolution. It is ideal for a wide range of security, broadcast and industrial vision applications. This lens is also available  as DC-auto iris SL940A and P-auto iris SL940P



  • 9-40 mm lens
  • FULL HD 5MP Resolution
  • Integrates with 1/3” 1-CCD / CMOS HD cameras
  • Robust, precise mechanics
  • Weight 66 grammes
  • "Day/Night" Lens
Focal Length 9-40mm
Image Format 1/3" up to 1/2.5" 
Adjustment Zoom, focus and iris adjustable with locking screws
Aperture Range F1.5 - Closed
Angle of View (H x V) 30-7.1 degrees x 22-5.3 degrees (H x V) (1/3" sensor)
Image Circle 6.0mm diameter
Focus Distance 2.5m - infinity
Modular Transfer Function 140 lp/mm @>20% edge
Minimum Object Distance 2.5m 
Resolution Up to 5MP
Back Focus None
Flange Focal Length 12.5mm (in air)
Mount CS-mount (metal)
Weight (g) 66 grammes
Dimensions 39mm (diameter) x 50mm (length)
Operating Temperature -20 to +50 degrees C


PRODUCT DATASHEET:                                     

Theia SL940M Lens Data Sheet (PDF)