All specification only show the minimal specifications manufacturers will at least meet. Often enough the real specifications of each tube are above those by far.

Photonis Commercial
Res: 30 lp/mm
SNR: 12
Sens: 270 uA/lm
Photonis cheapest IIT they still sell. Here is everything that does not meet at least XD-4 specifications. Tubes will have spots or some low specifications etc. Only thing Photonis guarantees is that they will light up.

Photonis ECHO
Res: 57 lp/mm
SNR: 24
Sens: N/A
FOM: min 1500 – max 1800
Photonis Echo tubes with wide spectrum bandwidth. They see what others do not see.  Echo tubes allow for more spots, but at a great value and performance.

Photonis ECHO+
Res: 57 lp/mm
SNR: 26
Sens: N/A
FOM: min 1800
Photonis Echo+ tubes with wide spectrum bandwidth. They see what others do not see. Echo+ tubes allow for more spots, but at a great value and performance. Compared to regular Echo tubes these have a min FOM.

Photonis 4G
Res: 64 lp/mm
SNR: 27 or 28
Sens: N/A
FOM: min 1800 and 2000
Wide spectrum image intensifier. Exceptionally high SNR and resolution. A much wider range of the light can be used with these tubes enabling them to beat Generation 3 in most environments.

Harder Gen 2+
Res: 64 lp/mm
SNR: 21
Sens: 700 uA/lm
Same price as the Photonis Supergen, but superior specifications. Great for rifle sights and other NVDs that are mounted on rifles. Also just a great option with a great value at a comparably low price.

Harder Gen 3 FOM1400
Res: 64 lp/mm
SNR: 23
Sens: 1800 uA/lm
Very good quality for an affordable price. Specifications are mostly close to the minimal specifications,  Around US Gen 3 OMNI5 from its performance/specifications.

Harder Gen 3 FOM1800
Res: 72 lp/mm
SNR: 25
Sens: 1800 uA/lm
Great specifications and sensitivity usually around 2200 uA/lm.  Mostly slightly above the minimal specifications. Around US Gen 3 OMNI 6-7 from its performance/specifications.

Harder Gen 3 FOM2100
Res: 70 lp/mm
SNR: 30
Sens: 1800 uA/lm
Ever heard of great OMNI7 or OMNI8 tubes? This is beyond that! Amazingly calm picture through high SNR and sensitivity usually above 2200 uA/lm. You want the best – there you go.

Harder (HD) Gen 3 FOM2400
Res: 72 lp/mm
SNR: 33
Sens: 2100 uA/lm
The best Harder manufactures. It simply doesn’t get better than these tubes. Extremely high light sensitivity, resolution and SNR.


Military / Law Enforcement restricted Image Intensifier Tubes available on request:

Harris
Excellent Gen 3 image intensifier tubes, available in green and white phosphor. Extremely high light sensitivity, resolution and SNR.


Aviation Image Intensifier Tubes available on request:

Harder (HD) Gen 3 FOM1800 to 2400
All the best features of Harder tubes but with extra shielding for fixed and rotary wing use. These are ANVIS type Intensifier Assembly with EMI shielding meeting MIL-STD-461-E.

Photonis XR5 and 4G FOM1800-2100
Build to aviation specifications and fully suitable to bring the best of Photonis in the air.

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