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Specification: Flash index: GN20m (ISO100, DIN21) Color temperature: 5600K Illuminating angle: Horizontal 60°, Vertical 40° Recovering time (sec.): 7 Flash duration (sec.): 1/1000 Triggering method: low voltage trigger Power source: 2xAA batteries (NiDd and NIMH chargeable batteries can be used) Dimension (mm): 65x60x98
Compatible with All ordinary digital camera and traditional cameras. Except Minolta and Sony anti-intercalation Shoe. Even if there is no hot shoe, through the primer flash can also be used successfully.
How to use: Index (GN) = aperture (F) x distance (L) For example: If the photo nasty is ISO100/DIN21, the distance between the camera and the main feature is 5m, then the aperture is approximately F/4. Fix the distance between camera and the object by your eye, and then find the parameter on the exposure meter. Find the photo nasty of your camera from the first vertical line of the left exposure meter. The joint of this two lines is approximately the aperture number. You can also get your aperture number from the following formula