08-31-2011, 08:21 AM
[quote name='bestremera' timestamp='1314731103' post='11172']
I must not be interpreting the test results correctly on photozone and think I'm missing something.
I have a 450D and use the EF-S 55-250. I consider it nice, but soft.
I have read good reports on the L series EF 70-200 f4 USM L (NON IS).
But if I compare the specs on photozone, the two lenses appear very close in resolution. Certainly in the realm of nearly indistinguishable differences.
If the 70-200 is a much better lens, why are the resolution figures so close?
Thanks, Bob
[/quote]
You consider the 55-250mm to be soft? On a 450D? This lens is generally seen as nicely sharp, for the price and class. Do you have any example to show its softness?
The 70-200mm f4 L USM has nicer background bokeh, which is its biggest plus, especially for close up stuff. Also has fast and silent USM, fast enough to track fast moving subjects in AI-Servo mode (and f4 at 200mm).
The 55-250mm is cheaper, lighter, provides a bit more tele reach and has images stabilization.
The differences are clear enough to make a choice over.... the 55-250mm for the budget conscious, who gain IS. The 70-200mm f4 L for those with not super deep pockets, for a lens that renders a bit nicer and has very fast AF. And for those who can afford it, the 70-200mm f4 L IS USM.
I must not be interpreting the test results correctly on photozone and think I'm missing something.
I have a 450D and use the EF-S 55-250. I consider it nice, but soft.
I have read good reports on the L series EF 70-200 f4 USM L (NON IS).
But if I compare the specs on photozone, the two lenses appear very close in resolution. Certainly in the realm of nearly indistinguishable differences.
If the 70-200 is a much better lens, why are the resolution figures so close?
Thanks, Bob
[/quote]
You consider the 55-250mm to be soft? On a 450D? This lens is generally seen as nicely sharp, for the price and class. Do you have any example to show its softness?
The 70-200mm f4 L USM has nicer background bokeh, which is its biggest plus, especially for close up stuff. Also has fast and silent USM, fast enough to track fast moving subjects in AI-Servo mode (and f4 at 200mm).
The 55-250mm is cheaper, lighter, provides a bit more tele reach and has images stabilization.
The differences are clear enough to make a choice over.... the 55-250mm for the budget conscious, who gain IS. The 70-200mm f4 L for those with not super deep pockets, for a lens that renders a bit nicer and has very fast AF. And for those who can afford it, the 70-200mm f4 L IS USM.