PHOTON - OPTICS DETAILS
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Focal Length

6.3mm

14.25mm

19mm

35mm

50mm
f/number

1.2

1.3

1.4

1.4

1.7

Field of View1

320x240
-

46° x 36°

36° x 27°

20° x 15°

14° x 11°

160x120

52° x 40°
-
18° x 14°
-
-
640x480
-
-
-
26° x 20°
18° x 14°

IFoV2 (milliradians)

320, 160

6.032

2.667

2.000

1.086
0.760
640
-
-
-
0.714
0.500
Minimum Focus Distance

~5 inches

~5 inches

~12 inches

~27 inches

~72 inches
Hyperfocal Distance3

0.25m

5 meters

7.5 meters

26 meters

35 meters
Hyperfocal Depth of Field4

 

2.5 meters

3.8 meters

13 meters

18 meters

Weight
(Lens & Lens Mount only)

55g

56 g

33 g

88.5 g

128 g
Length (Lens Only)

0.377”

1.209”

0.769”

1.709”

2.632”
Diameter (maximum)

1.250”

1.654”

1.024”

1.654”

1.772”
Coating Type
High Efficiency
High Durability
Hard Carbon5
Nominal Wavelength
8.0 to 14.0 microns

1 Field of View describes the angular measure of a scene imaged with the given pixel array, expressed as degrees in horizontal by vertical directions.
2 Instantaneous Field of View is the angular measure of a single pixel. Small angles are usually measured in milliradians. The IFoV is the pixel size (in microns) divided by the lens focal length
3 Hyperfocal distance is the distance beyond which all objects are acceptably sharp, for a lens focused at infinity.
4 Hyperfocal depth-of-field is the theoretical maximum depth-of-field achievable, and is obtained when a system is focused at the hyperfocal distance. Higher f/number optics generate larger depths-of-field by sacrificing signal or minimum temperature resolution.
5 Coating Type for 35mm and 50mm configurations of Photon 640 will be High Durability, not Hard Carbon.