Lens Mounting

Lenses are not included with cameras. Teledyne FLIR IIS sells a number of lenses compatible with our cameras from our Accessories àLenses page. There is also a Lens Calculator to help choose an appropriate lens.

Note: An IP-rated lens tube is required to retain the IP rating of the camera.

Teledyne FLIR IIS sells a compatible IP-rated lens tube (ACC-EN-LC38F-60A).

	Internal Usable Diameter (A)	Internal Usable Length (B)	Outer Diameter (C)	Overall Length (D)
ACC-EN-LC38F-60A	38	45	44.2	60

Correct focus cannot be achieved using a CS-mount lens on a C-mount camera.

Related Knowledge Base Articles
Selecting a lens for your camera

Back Flange Distance

The Back Flange Distance (BFD) is offset due to the presence of both a 1 mm infrared cutoff (IRC) filter (color models only) and a 0.5 mm sensor package window. These two pieces of glass fit between the lens and the sensor image plane. The IRC filter is installed on color cameras. The sensor package window is installed by the sensor manufacturer. Both components cause refraction, which requires some offset in flange back distance to correct.