The sharp and fast reach of the zoom

[Rafael Lopes]

Lately I've been toying with the idea of buying a zoom. The idea would be to use it as a polivalent lens that I can take anywhere whenever taking my 3 amigos (28mm f1.8, 50mm f1.8, 85mm f1.Cool can prove to be a difficult task, or even for more casual shooting. So I was hoping for something like a 24-70mm or a 28-80mm (ideal, since it almost covers all my prime lenses's range). I was wondering what is the fastest gun around. I was thorned between a tokina or a sigma (both constant f2.Cool, but then I've read this http://www.tawbaware.com/sigma_tokina_test1.htm and changed my mind.
Any advice? Of course, no question of mine can be that easy, so here it comes...I DON'T want to pay 1000$!

[Ben Winter]

What you really need to ask is how much resolution your camera is ultimately seeing, after a groundglass interaction and MPEG compression to a vastly inferior resolution.

A canon 50mm 1.8 may produce a sharper image than a zoom but to your camera they may look the same.

I bought a zoom a while ago for the same reason but they shipped it to the wrong address so I haven't gotten me mitts on it yet.

[Rafael Lopes]

Originally Posted by Ben Winter

What you really need to ask is how much resolution your camera is ultimately seeing, after a groundglass interaction and MPEG compression to a vastly inferior resolution.

A canon 50mm 1.8 may produce a sharper image than a zoom but to your camera they may look the same.

Those were exactly my initial thoughts, but I none the less I would feel better if I could have seen some 35mm footage with a zoom. I just bought a Sigma 24-70mm f2.8 Macro. I already have a sigma 28mm f1.8 (that I love), a 50mm f1.8 and a 80mm f2.0. It'll be a good experience to put the zoom to the test against these.