professional streak retinoscopes YZ24
* Features
1. The well positioned filament can be roated for 360 degree and upward and downward moved Brightness of the streak can be adjusted.
2. Quickly and precisely measure the astigmatism axis.
3. The light can be converged, radiated and paralleled.
4. Automatic turning off effectively protects the bulb.
5. Two-steps adjustable brightness for bulb: S(Bright), W(Dark).
* Specifications
Working Distance: 1m
Streak: 3mm~20mm
Streak Rotation: 360 degree
Illuminiation Source: 3V/2.1W, Halogen Bulb
Input Voltage: AC 100V~240V / 50Hz~60Hz