Surnia Lenses

Surnia Diagram This line has the fastest F# available among the standard lenses offered, allowing for the maximum amount of energy to reach your focal plane. This line is designed for camera systems with a stop, and longer back working distance (BWD) which is common for cooled systems or detectors requiring a radiation shield. However, it can be adapted to most LWIR cameras. This is certainly the lens of choice to get the most out of your infrared imager.

 

 

 

Focal Length
25mm
50mm
Part Number
40588-AA1
40553-AA1
F#
0.86
0.86
Wavelength
7 – 14µm
7 – 14µm
Image Diagonal
21mm
21mm
Stop Size
26.4mm
26.4mm
Stop Position
22.9mm
22.9mm
BWD
35.6mm
35.6mm
Flange to F.P.
39.4mm
39.4mm
Mount Type
T
T
Circular FOV (degrees) ***
45
23
Weight (g)
400
454
Min. Obj. Distance **
200mm
500mm
Focus Type
M
M
Transmission (typical) *
95%
93%

Notes:
*** Based on the listed Image Diagonal, FOV will vary depending on focal plane size.
** Closest an object can be focused in on.
* Over the primary waveband, 7 – 14µm.

Mount Type:

T = Threaded Mount
M = Manual Focus