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Basler Lens C23-3520-5M-P#

Basler Premium C-mount lens with a fixed focal length of 35 mm, aperture range from F2.0–F16, and a resolution of 5 MP.

Basler Lens C23-3520-5M-P F2.0 f35.0 mm

Key Features#

  • Fits all Basler cameras with a sensor size of up to 2/3"
  • Metal housing
  • C-mount
  • Locking screws for iris and focus
  • Aperture indicators on iris ring and lens barrel
  • High contrast


The technical data shown in the following sections are nominal design values. The real values of the delivered products can deviate from the nominal design values.

General Specifications#

Order Number 2200000572
Focal Length f' 35.09 mm ± 5 %
Aperture Range F2.0–F16
Aperture with Highest Resolution F2.4
Image Circle 11 mm (2/3" format)
Focus Range 0.2 m to infinity
Optimum Working Distance 0.3 m
Relative Illumination at Full Aperture 73 %
Resolution Designed for 147 LP/mm (3.40 µm pixel size, see Resolution versus Image Height)
MTF Measured in the Center at 90 LP/mm / 140 LP/mm (conditions: F2.0, polychromatic, 0.45 m working distance) 0.65 / 0.54
MTF Measured in the Corner at 90 LP/mm / 140 LP/mm (conditions: F2.0, polychromatic, 0.45 m working distance) 0.4 / 0.23
Optical Distortion Typical 0.14 %
Angle of View, 1/1.8" Format Horizontal: 11.7°
Vertical: 8.7°
Angle of View, 2/3" Format Horizontal: 14.3°
Vertical: 10.8°
Wavelength Range Visible (400–700 nm)
Back Focal Length, s'F 17.65 mm

→ See Terminology (Basler Lenses).

Mechanical Specifications#

Flange Back 17.526 mm
Mount C-mount
Weight Approx. 71.0 g
Focus/Iris Operation Manual

Lens Dimensions#

Basler Lens C23-3520-5M-P

→ Download the CAD/technical drawing for your Basler Lens.

Precautions, Mounting, and Cleaning (Basler Lenses)#

→ See Precautions, Mounting, and Cleaning (Basler Lenses).

Environmental Requirements#

Temperature During Operation -10–50 °C (14–122 °F)
(For best results, adjust the focus when a steady operating temperature has been reached.)
Humidity During Operation 10–90 % relative humidity, non-condensing
Temperature During Storage -20–60 °C (-4–140 °F)

Performance Chart#

Resolution versus Image Height#

Conditions: f/2.0, polychromatic, 0.45 m working distance

Resolution versus Image Height