Covering the front of the flash unit is a ?diffuser or plastic cover. Does that block any wavelengths of light or is all visible , UV and IR light generated by the flash bulb allowed to get through?
Thanks for answering. I understand the use of diffusers but I was asking as for some work I’ve been wanting to do with in particular uv light work, it was said that for some older flashguns I had to remove the diffuser as it was potentially uv blocki...
