Ok, First of all these are the types of question that pop into my head in the middle of the night. Don't ask me why, but it is what is.
Anyway, I have a 70-200 mm f/4 L non-IS that I use pretty much all of the time with the lens hood on. My question is: does the hood prevent some light from reaching the lens and therefore affecting the amount of light needed to take a pic. In other words, if I had the hood off, would I be able to take pictures in somewhat less light?
Thanks for your thoughts.