Dalsa Genie Nano Series - Additional Reference Information; Choosing a Lens with the Correct Image Circle; Lens Options for Models M;C1920, M;C1940

270 • Additional Reference Information Nano Series GigE Vision Camera
Additional Reference
Information
Choosing a Lens with the Correct Image Circle
Each Nano model requires a lens with an image circle specification to fully illuminate the sensor.
The following section graphically shows the minimum lens image circle for each Nano model family
along with alternative lens types. Brief information on other lens parameters to consider follows
those sections.
Lens Options for Models M/C1920, M/C1940
• The following figure shows the lens image circles relative to Genie Nano models using the
Sony IMX174 and IMX249 sensors respectively, in color or monochrome versions.
• A typical 1” lens will fully illuminate these sensors while the use of a 2/3” lens will have
some corner vignetting.
• Note the “horizontal blue dashed lines” defining the HD video format. These indicate setting
the Image Format controls to Height=1080 with a Vertical Offset=60.
IMX174
IMX249
1" Lens (~16mm)
Image Circle
1.3" Lens (~22.5mm)
Image Circle
2/3" Lens (~11mm)
Image Circle