kphoto99 said:
The reviews of the 50mm 1.8 claimed that it was better then Canon's 50mm 1.8 II
It's a mixed bag depends on what you care about.
LensTip - Yongnuo:
http://www.lenstip.com/425.4-Lens_review-Yongnuo_YN_50_mm_f_1.8_Image_resolution.html
LensTip - EF 50mm f/1.8 II:
http://www.lenstip.com/424.4-Lens_review-Canon_EF_50_mm_f_1.8_II_Image_resolution.html
"At first glance you can tell the Yongnuo performs noticeably worse than the Canon 1.8/50 II. Especially its performance by f/1.8 and f/2.0 is disappointing because the MTFs are distinctly below the decency level. In order to enjoy an acceptable image quality in the frame centre you have to stop down the tested lens to near f/2.5. In the case of the edge of the APS-C sensor you get sensible MTFs after stopping down the aperture to almost f/4.0 and on the edge of full frame you have to employ f/5.6. Such a performance can only be called weak"
...but in fairness the Yongnuo had a better AF hit rate, and LensTip thought the build was a shade better. From some of their commentary, their lens was not a straight clone -- some elements were made larger and the focus ring works a little better.
Whaddya know. Huh. I stand corrected.
- A