denoir wrote in post #9928191
Although I have never tried that specific Tamron, I have yet to try a super zoom that has anything even approaching acceptable IQ. IMO, they just ruin the photo - unevenly soft, bad color reproduction, bad contrast etc etc
I had a Sigma 18-200 OS on my 350D a few years ago and when I look at the pictures I'm almost always disappointed. There are some great shots completely ruined by the crappy glass. I also have experiences with the Canon 18-135/IS which are rather poor as well.
With all due restect, I think that's a little too dramatic. Ruining the photo? Come on
I guess we should all be walking around at Disney with 2-3 1DsIII and at least 5 L lenses
I don't know about others but I'd draw the line somewhere; If I went to Disney with my family I wouldn't want to carry around 2 bodies with a big lens collection. It would just really take away from having fun with the family. I think even taking the suggested G11 (or other good P&S) would allow you to have more fun than a big bag of gear.
I think the 18-270 VC is a very good alternative in this situation for an all in one. There are lots of great shots in the Lens Sample Archive taken with this lens.
And as for the 18-55 55-250 combo, that's a good alternative and great value if you don't mind changing lenses and missing the occasional shot. Been there done that.
EDIT: I see that the OP does have the Canon combo. I agree, just take those 2, don't rent the Tamron, save some money for the $9 hamburgers