« on: March 02, 2014, 03:01:33 PM »
The only problem with the comparison above is that it is not at the same aperture. The 55-250 is at f/5.6, while the 70-200 is at f2.8. Closing the 70-200 to f5.6, the image seems to get sharper than the 55-250, but just a little bit.
Sorry, I must have copied the URL before I changed the aperture for the 70-200. With both at f/5.6 the 55-250 looks a little sharper to me at the corners and very close at mid frame. I'd give the 70-200 a slight edge in the center. This is very surprising. I took the comparisons a little further and compared the 55-250 to two of the best primes in that range, the 135 f/2L and 200 f/2 L. To me the EF-S zoom looks a little better than the highly regarded 135mm f/2 L at f5.6 and even holds its ground against the legendary 200 f/2 L (a lens that cost 17x more) at that aperture.
Of course, these f/2 and f/2.8 lenses are much faster and have L build quality. But, my conclusion is that the EF-S 55-250 STM is a terrific lens for the money.