FX-YSY-XXS Pilot Helmet

Field of View: 40° or better;
Magnification: 1×;
Objective/Focal Length: 25 mm minimum;
Objective F/#: 1.3 maximum;
Minimum Resolution (cy/mr): 1.1;
Minimum Luminance Gain (fl/fl): 2800 or better;
12-Tube Minimum Resolution: 55 lp/mm or better;
Eyepiece: 25 mm minimum or better;
Eye Relief: 25 mm minimum or better;
Diopter Adjustment: +2 to -5 or higher;
Interpupillary Distance Adjustment: 52 to 72 or higher;
Elevation Adjustment: 25 mm range;
Fore-and-Aft Adjustment: 27 mm range;
Tilt Adjustment: 10°;
Automatic Separation: 10 to 15 G or better;
Tube Weight: 600 g maximum;
Battery Type: 2 AA alkaline batteries or better;
Operating Temperature Range: -32°C to +52°C or higher;