1) f/number means the size of the apenture right? What does it exactly translate to? 2) I've been looking for a tripod all day, something light and very quick release legs but the review sites are all **** and the pictures online don't seem to go into any detail. There are tons of them available but I can't find something that isnt stupidly expensive. The Gitzo's look good but are chuffing expensive. They had some twist release ones in Jessops but they were only two section so only came up to my chest. 4) Are ebay batteries any good? EDIT: Nm: 2 batteries on 7dayshop for a tenner = job done.