What tubes are we using?
Photonis ECHO (Commercial grade)
Res: min. 57 lp/mm
SNR: min. 24 Sens: N/A FOM: min. 1600 – max 2000 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. -But even with some spots there will be no really disadvantages for the normal end-user, especially in motion spots are not really disturbing.
Photonis ECHO+ (Commercial grade)
Res: min. 57 lp/mm
SNR: min. 26 Sens: N/A FOM: min. 2000 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 2000 FOM.
Photonis 4G (Milspec grade)
Mil spec grade tubes from Photonis N/A FOM: min. 1800 Photonis 4G tubes with wide spectrum bandwidth and a better performance in lower / no light conditions. They see what others do not see. 4G tubes are allowed to have less spots than ECHO or ECHO+ tubes, but for their performance there are more expensive Compared to regular Echo tubes.