Canon has announced an updated version of their 35mm f/1.4 L prime lens.  The original, released in 1998, was not up to current standards and did not make the list of recommended lenses for Canon's latest high MP DSLRs the 5DS and 5DSr.   The new version looks sharp and offers new, Blue Spectrum Refractive Optics element to refract the shorter wavelengths of the visible spectrum (blue light) in order to significantly reduce chromatic aberrations and color fringing.Priced at $1799 - Available in early October. Pre-Order now from B&H Photo | AmazonI am curious how it will compare to the Sigma 35mm f/1.4 DG HSM Art Lens that sells for just $899. We love our Sigma lenses and found the Sigma 35(compared to the original Canon 35mm) and Sigma 50 to be sharper than their Canon counterparts. Watch my comparison of 50mm lenses.  You do get weather sealing with the Canon L lenses, not with Sigma and I expect this fancy new Blue Spectrum Refractive Optics will control CA well but honestly I don't find the Sigma to suffer much.   Which would you pick and why?Sigma 35mm f/1.4 DG HSM Art Lens vs Canon EF 35mm f/1.4L II USM Lens - Leave a comment below with your pick.  And don't forget APS- shooters, you have the very nice Sigma 18-35 f/1.8 as an option. Watch my Sigma 18-35 f/1.8 Review.