I am a newbie here. I would like to ask a question and hope to receive some replies.
I am looking forward to buy a new len (80-200mm) and I was told that the len has a constant f2.8. What does this mean?
Does this mean at any focal length from 80-200mm I can fix my F-stop to 2.8? but I still have a choice to close up my aperture if I want to? or it is only at 80mm then I can get f2.8 and when the focal length increases the f number gets bigger?
Thanks for answering my queries... hope i can have some reply soon as I am getting the lens in a couple of days.