Canon EF 70-300mm f/4.5-5.6 USM DO IS - Full Format Review / Test Report
3 April 2008
Conclusion: The Canon EF 70-300mm f/4.5-5.6 USM DO IS is a promising new approach ... on paper at least. The DO elements allows a much more compact design compared to conventional lenses and our camera bags are certainly bulky enough already so that's something to be appreciated for sure. However, optically the lens stays somewhat short of expectations. The 70-300mm DO IS is certainly sharp at 70mm but at 200mm and 300mm it's a bit softer than it should be.
Canon EF 70-300mm f/4.5-5.6 USM DO IS - Review / Lab Test Report
19 March 2008
Conclusion: In principal the Canon EF 70-300mm f/4.5-5.6 USM DO IS is a very interesting lens ... in principal. From a performance point of view it delivers all that a consumer has hoped for - high resolution figures in conjunction with low distortions, low vignetting and low chromatic aberrations and all packaged in a quite sturdy, small package with high speed AF. So what is the problem ? Well, it's the price tag.