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Basler Lens C11-3520-12M-P#

Basler Premium C-mount lens with a fixed focal length of 35 mm, aperture range from F2.0–F16, and a resolution of 12 MP.

Basler Lens C11-3520-12M-P F2.0 f35.0 mm

Key Features#

  • Fits all Basler cameras with a sensor size of up to 1.1"
  • 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 2200000578
Focal Length f' 35 mm ± 5 %
Aperture Range F2.0–F16
Aperture with Highest Resolution F2.5
Image Circle 17.6 mm (1.1" format)
Focus Range 0.15 m to infinity
Optimum Working Distance 0.5 m
Relative Illumination at Full Aperture 73 %
Resolution Designed for 140 LP/mm (3.57 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) 0.62 / 0.45
MTF Measured in the Corner at 90 LP/mm / 140 LP/mm (conditions: F2.0, polychromatic, 0.45 m working distance) 0.59 / 0.4
Optical Distortion Typical -0.10 %
Angle of View, 1" Format Horizontal: 20.8°
Vertical: 15.6°
Angle of View, 1.1" Format Horizontal: 23.0°
Vertical: 16.9°
Wavelength Range Visible (400–700 nm)
Back Focal Length, s'F 12.00 mm

→ See Terminology (Basler Lenses).

Mechanical Specifications#

Flange Back 17.526 mm
Mount C-mount
Weight Approx. 240 g
Focus/Iris Operation Manual

Lens Dimensions#

Basler Lens C11-3520-12M-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 -20–60 °C (-4–140 °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