Banner PresencePLUS Megapixel C-Mount Lenses - Manual (Page 19)

Lens Selection Guide
16
P/N 69950 rev. B
Banner Engineering Corp. • Minneapolis, MN • USA
www.bannerengineering.com • Tel: 763.544.3164
Focal Length Formula
NOTE: Working distance and FOV must be known in order to use this formula. See Field of
View on page 1 and Determining Working Distance on page 3.
PresencePLUS Pro Camera Imager Width = 4.8 mm.
PresencePLUS Pro Camera Imager Height = 3.6 mm.
For Vertical FOV, replace Camera Imager Width with Camera Imager Height.
Example:
What focal length is needed to view a 45-inch wide object from a distance of 200
inches?
The best option is to use a 25 mm lens.
Working Distance x Camera Imager Width (Height)
Horizontal (Vertical) FOV
Focal Length =
200" x 4.8 mm
45"
= 21.25 mm Focal Length =