Features

◆The filament can be rotated for 360° and move upward and downward. Brightness of the streak can be adjusted.
◆Quickly and precisely measure the astigmatism axis.
◆The light can be converged, radiated and paralleled.
◆Automatic Power Off function effectively protects the bulb.
◆Two-steps adjustable brightness for bulb: S(Bright) and W(Dark).