Varia Lenses
The Varia line is designed in support of cooled LWIR systems. These high performance long wave focal planes do not require the fast F# as do the uncooled type. This makes the Varia line an economical choice, while still maximizing the camera performance. This similar mechanical features as the Asio line, which allows for the use of the bayonet mount and the same accessories.
| Focal Length |
13mm
|
25mm
|
50mm
|
100mm
|
| Part Number | ||||
| F# |
2.0
|
2.0
|
2.0
|
2.0
|
| Wavelength |
8 – 12µm
|
8 – 12µm
|
8 – 12µm
|
8 – 12µm
|
| Image Diagonal |
21mm
|
21mm
|
21mm
|
21mm
|
| Stop Size |
12.4mm
|
12.4mm
|
12.4mm
|
12.4mm
|
| Stop Position |
25.4mm
|
25.4mm
|
25.4mm
|
25.4mm
|
| BWD |
33.1mm
|
33.1mm
|
33.1mm
|
33.1mm
|
| Flange to F.P. |
39.4mm
|
39.4mm
|
39.4mm
|
39.4mm
|
| Mount Type |
B
|
B
|
B
|
B
|
| Circular FOV (degrees) *** |
75
|
45
|
23
|
11
|
| Weight (g) |
340
|
284
|
284
|
766
|
| Min. Obj. Distance ** |
75mm
|
200mm
|
500mm
|
1750mm
|
| Focus Type |
M
|
M
|
M
|
M
|
| Transmission (typical) * |
95%
|
95%
|
95%
|
95%
|
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, 8 – 12µm.
Mount Type:
B = Bayonet Mount
M = Manual Focus