Not excatly true ...... if your wide end starts at 10mm then 12x Zoom = 120mm only ... Exactly how high is 12x depends on the wide side of the lens actually. It just happens your wide side starts at 38mm or 37.5mm and thus your long side is 450mm
Agree, it does take a while to "digest" (same for me initially).
Forget about how many times zoom, it doesn't say much technical info--only marketing guys make it sound like the world depends on maximum zoom power.
Know that the shorter focal lengths (e.g. 15mm) are wide-angles, you can see a lot--good for landscape. Of course all the objects look smaller. The longer focal lenghts (e.g. 300mm) are telephotos, you don't see much of the surrounding left and right, but you can see far--good for shooting birds. The objects are "larger" too.
So for your camera, it goes from 35-450? Means you can ZOOM from 35 (wide) to 450 (telephoto). The lenses that gives best quality have fixed focal lengths (i.e. cannot zoom; or 1x zoom!).
Just refer to this link. This is assuming you're standing on the same spot but with different focal lengths. *click* on the different focal lengths and see the difference it makes (Note: I've no affiliation to Canon whatsoever, I just find it a very good interactive example).
Ayo people can miss inform and complicate thing man. When we put 24-70mm mean it is a zoom lens that you can zoom from 24mm (the widest focus length) to 70mm (the longest focus length). Focus length is not equal to zoom factor :bsmilie:
No, it wouldn't make sense to get the 70-200mm f2.8 if you don't need it ;p
f2.8 gives a shallower depth of field and it's also a fast lens as Witness mentioned. Either way, you'll find that a wide aperture does come in handy.
The 28-300mm is a good general lens but you might want to think of upgrading in the future. I have a Tamron 28-200mm f3.8-5.6, it's adequate, but not great.