MagicShine 900: Flash Rate? Faint P7 activity when off?
Just got my MagicShine 900 from Geoman (great service).
Two items have me slightly concerned:
1. Seeker333 stated he estimated his flashed at about 4 Hz
. When I put mine on flash, it has a much higher flash rate. However, Seeker3333's light cycles high->low->strobe (~4hz)->off; mine adds an SOS to this and cycles high->low->strobe (~32hz)->SOS->off. CORRECTION: Mine adds both an SOS and a medium setting, so mine cycles high->med->low->strobe (~32hz)->SOS->off.
I took photos at 1/4 second exposure of marked spokes on a spinning wheel and counted the number of images of the marked spoke. Depending where the flash cycle is when the shutter opens and closes, you need to add & subtract 0.5 from the number of images of the spoke to calculate the flash frequency range. At 1/4 second I got 8 images of the marked spoke. Thus the flash frequency of mine is somewhere between about
(8 - 0.5) * 4 = 30 Hz and (8 + 0.5) * 4 = 34 Hz.
Is anyone else getting a flash rate this high in a MagicShine recently purchased from Geoman (or others)? Since mine adds an SOS after the flash setting, does mine have a different chip controlling the light?
2. When the light is turned off but connected to the battery, the P7 LED in mine remains very faintly on with some flickering. This is very faint; you have to turn off the lights in a room or shield external light with your hands to see this. Has anyone else noticed this or could they take a look at their light? Might this be the phosphors in the P7 LED being excited by the rear pilot light in the switch?
p.s. Swinging a pencil or similar object rapidly back in forth shows the duty cycle at the ~32 Hz flashing is ~50% on, ~50% off.
Last edited by Giro; 09-17-09 at 07:09 PM.
Reason: Corrected my light cycling: high->med->low->strobe (~32hz)->SOS->off