Banner PresencePLUS Megapixel C-Mount Lenses - Manual (Page 7)

Lens Selection Guide
4
P/N 69950 rev. B
Banner Engineering Corp. • Minneapolis, MN • USA
www.bannerengineering.com • Tel: 763.544.3164
Determining Focal Length
Focal length is the distance between the rear nodal point of the lens (the point where the light
rays leave the rear of the lens) and the camera’s imager and is specified in millimeters.
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Focal Length Tools
To choose the best focal length for a specific application, use any of the following tools:
Focal Length and Lens Extension Tables . . . . . . . . . . . . . . . . . . . . . . . . . . page 6
Working Distance vs. FOV Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10
Focal Length Formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 16
Model PPCAM
Camera
Lens Imager
Focal Length