70-200mm F2.8 Zoom Lenses Engagements

70-200mm F2.8 Zoom Lenses Engagements

There are DSLR camera lenses have similar specifications from different lens providers. For example, we can find 70-200mm F2.8 zoom lenses on the market from major DSLR providers like CANON, NIKON and SONY, and we can also find 70-200mm F2.8 zoom lenses from third-party lens providers like TAMRON and SIGMA. All those lenses have the same focal length and aperture size, but they do not have similar prices. All 70-200mm F2.8 lenses from major DSLR providers have expensive prices, starts from USD $1800. But the prices of 70-200mm F2.8 zoom lenses from the third-party lens providers TAMRON and SIGMA are much better; it costs less than USD$1000 to bring one home. What are the differences among all those 70-200mm F2.8 lenses? Are expensive lenses always better? Is there any chance for a low price lens to have better image quality than the expensive lens? There are questions and doubts on my mind and keep on disturbing me for quite a period.

I surf on the Internet and trying to find answers, unfortunately, up to now, all I can find are individual lens reviews only. It is not easy to find lens comparison articles. So I decide to do the comparison by myself. I am not an expert and I have no optical instruments to make precise comparisons. The main instrument that I have is a Chinese checkerboard only. There are no hard to understand MTF charts, and no boring digital data sheets in my tests. Just by taking a lot of simple pictures on the checkerboard and checking those pictures in details very carefully, finally those pictures provide me the answers I want. Followings are the comparisons and tests for the DSLR camera lenses. I do my test from the most exciting lenses: 70-200mm F2.8 zoom lenses. I guess they are the dream lenses for all DSLR camera users.

70-200mm F2.8

The Big 5 lenses together : Tamron Canon Nikon Sony Sigma 70-200mm F2.8