A device for the latent traces macro photography of the papillary

摘要

The accessory has an opaque demi-sphere (8) covering each of two flashes, with a vertical window at their centers. A divergent lens (5) is fitted in this window. A continuous, battery-powered (6) light source (4) is behind the lens, and allows the final image to be seen before the flash is activated and the photograph taken. Perfect alignment to the normal to the surface can be obtained.