Sigma AF 100-400mm f/5-6.3 Lens Review - X Mount

This is the third mount option for this lens, the first two being for L mount and E mount. Indicating increasing potential for offering further options, this full frame mirrorless lens design is now released in a Fuji X version. As Fujifilm cameras are APS-C crop sensor designs, the use of a full frame lens bodes well for something special in the way of even optical quality across the frame. So, armed with the new lens and the 26MP Fujifilm X-S10 body, let's see how the new version of the lens w