broncolor UV Attachment
The UV attachment eliminates practically the entire visible light of the
flash. Only the UV part remains. This enables unlimited applications in
technical (reproduction, material analysis, forensic photography etc.) and
in creative photography, wherever dyes are being used.
The attachment blocks out visible light and lets ultraviolet light (UV-A) and
a small portion of UV-B in the range of 300 – 315 nm pass through.