Hank: Thanks for the in

Hank:

Thanks for the info. It was very helpful. It’s funny how you get used to and think you know a concept (i.e. “focal length”) and then find out that you really have no idea about what it really is.

I had tried googling “focal length” but came up with so many hits it was like trying to find a needle in the haystack….so thanks for the tip.