|Quoting viv (Reply 4):|
Few zoom lenses are as good as prime lenses.
Of course. All zoom lenses have to make compromises which means they'll never match a highly optimised prime. That's not to say there aren't very good zooms out there (I have, IMHO, Nikon's finest offerings in that respect), but you cannot expect a zoom with over 10x focal range to be very good across much of that range.
A long time ago, when I was first starting out in photography, an old pro advised me to never go for a zoom lens that had a range in excess of 3 to 4 times the shortest focal length. Mine all still follow that 'rule' (14-28, 28-70, 70-200 & 200-400).
Time flies like an arrow. Fruit flies like a banana!