A honeycomb filter provides direction for the light, but doesn't concentrate it (or diffuse it) as does a Fresnel.
A honeycomb filter provides direction for the light, but doesn't concentrate it (or diffuse it) as does a Fresnel.
"There are a great many things I am in doubt about at the moment, and I should consider myself favoured if you would kindly enlighten me. Signed, Doubtful, off to Canada." (BJP 1914).
Regards
Bill