Maybe if you hadn't dropped that comment to let us know about all your L glass, this conversation would be moving in a useful direction.
You say no to the 55-250, then suggest the 18-200, which has some of the most uneven performance of anything Canon makes. To top it off, the 18-200 costs over twice what the 55-250 does, falling outside the OP's budget before even adding a camera.
OP said $500 budget. Entry-level zoom options are (Prices new/used):
EF-S 55-250mm f4-5.6 IS I/II $250/$150
EF 70-210mm f3.5-4.5 USM ---/$150
EF 70-300mm f4-5.6 USM IS $500/$300
EF 75-300mm f4-5.6 III $150/$100
Sigma 70-300mm f4-5.6 DG APO $200/$100
We don't talk about the 75-300, and the rest are fine for this budget. I recommend the 70-210 USM (not to be mistaken for the 70-210 push-pull) when it can be found, because it's the only ring USM lens on this list and will focus just as fast as the 70-200/4L.
Quote:
Originally Posted by outkast kid
Everyone is shouting 40D but a t3i is going to blow that body out of the water in every technical category except frames per second.
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...And autofocus.
Here's the breakdown, 1DII vs. 40D vs. 30D vs. T3i.
Quote:
1D Mark II(n)
• 45-point TTL CMOS sensor
• 9 center points cross-type for lenses F2.8 or faster
• F4 cross-type at center
40D
• 9-point TTL CMOS sensor
• All points cross-type for lenses of F5.6 or faster
• Center point additionally sensitive with lenses of F2.8 or faster
30D
• 9-point TTL CMOS sensor
• F2.8 cross-type at center
T3i
• 9-point TTL CMOS sensor
• F5.6 cross-type at center, extra sensitivity at F2.8
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OP: "Cross-type" points have both horizontal and vertical sensitivity, which makes them more versatile.
The 30D is the worst of the bunch, with no cross-type sensitivity for any of the lenses listed above. The T3i is the second worst, and the most expensive option at $450 used. The 30D is down to $200-250, 40D $250-300, 1D2 $400-600, 1D2n $500-700.
TL;DR: I would try to land a 40D and 55-250 or 70-210.