So f/2.8 is a smaller number than f/4 but when it comes to apertures f/2.8 gives you more light than f/4 and then you get f/5.6 why 5.6? Why not just f/6 what does “f” mean? Before I start typing random fs and confuse things more check out this great explination at Pixiq.
Founder of PhotoComment. In a relatively short space of time he has experienced the photography industry almost full circle. From camera repairs, to photographic retail, wholesale, marketing for one of the large camera brands, part time photographer and of course blogger there is hardly a moment when he is not eating, drinking and occasionally getting some sleep where photography is not involved.