Lello,
Thinking behind the straws was as in a honeycomb which limits spill light. Years ago for work I used a larger square of works honeycomb material to good effect so I guess that idea stuck in the back of my mind. Straws should act as a light straightener.
Easy enough I will do a comparison today without the straws. I need to see if I can come up with a zoom version anyway.
Don
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