rogue.guineapig wrote in post #17559240
Lbsimon:
Well I figured a 70-200 to have good value beyond the trip, and to be another tool in the toolkit I guess.
Also... I just want one.

Seriously though, there's been a few times that I've wanted a longer zoom,
and I know it would get used beyond my news internship.
40C is hot... 'course, I live in Phoenix and we do see 48C or so every summer.

Either way it's too hot!
So the f/4 IS is better than the Non-IS... that's definitely the kind of tips I'm looking for!
Is the f/4 in general regarded as superior optically to all but the /2.8 IS II?
jkdwings: so in your experience you'd rather sacrifice weight for the IS rather than bigger 2.8 aperture?FarmerTed: Thanks for the f/4 vote! It seems like it's no slouch by any standard.
Yeah, the size of the 2.8 is just larger than I want to pack in my bag. I mean, my camera gear already takes up more than the rest of what I travel with weight and size-wise. In terms of low-light shooting, I reckon the 3-4 stop IS is more valuable to me than the 1-stop aperture change. For instance, if the lighting only allows me to shoot at 1/60 of a second, I'm going to struggle to have no motion-blur at 200 mm. If I had the f/2.8 I could bump the speed up to 1/125, but that still might not be fast enough. With the IS, I can hand-hold that lens at 1/60. Just my thoughts, anyway.
I just got back from an 8 month motorbike trip down to Mexico and in that time I used my f/4L mostly for street portrait work and sports shooting. Sports were white-water kayaking, rafting, sand boarding, soccer, and the odd horse race. Honestly, the odd time that I wished I had 2.8 would not have justified the larger lens for the trip.
Jason
Canon 7D | Opteka 6.5mm/3.5 Fisheye | Tokina 11-16/2.8 | Canon 15-85/3.5-5.6 IS USM | Canon 35/2IS | Canon 50/1.8 II | Helios 44-2 58/2 | Sears 135/2.8 | Canon 70-200/4L
Canon T1i | Canon 18-55/3.5-5.6 IS