|Focal Length(EFL)||27mm||f Number (f#)||2.0|
|Wavelength Range||3.7~4.8 micro||Detector||640x512-15micro|
|Average Transmittance||>81%||Working Temperature Range||-40℃ ~ +50℃ (Need not to refocus)|
|Maximum Diameter||32mm||Overall Optical Length||74.57mm|
|BFL||32.72mm (8.09mm in air, 24.63mm in detector)||Distortion||<4%|
27mm F2.0 athermaiized lens module is designed for cooled detector ( InSb FPA Focal Plane Arrays) of 640x512-15μm at MWIR wavelength range 3.7~4.8μm, it is optical passively athermalized, and is optimized optically for good MTF and low distortion at temperature range of -40℃ to +50℃. Please see the following data sheet and curves to get more information about this lens module. The improvements and changes of the design is available for customer’s special request.