Third Party Lenses Sigma 85 1.4 Pricing & MTF Canon Rumors Posted onMay 28, 2010 at 3:36 PM Updated onUpdated on May 28, 2010 at 6:03 PM This site contains affiliate links to products and services. We may receive a commission for purchases made through these links. The Sigma 85 f/1.4 You can preorder this lens from Amazon. Preorder for $899 USD Left: Nikkor 85 f/1.4 Right: Sigma 85 f/1.4 Canon 85 f/1.2L II MTF Thanks Jackola cr Share on Facebook Share on Twitter Share on Google+ Canon Rumors View all 8612 articles Website
IIRC, 1 stop difference is defined when the difference in the aperture area is 2 times (or 100% bigger in other words). Here: (1.8 * 1.8 – 1.4 * 1.4 ) / (1.4 * 1.4) = 65.3% I’d say the difference is in between 1/2 and 3/4 stops.
IIRC, 1 stop difference is defined when the difference in the aperture area is 2 times (or 100% bigger in other words).
Here:
(1.8 * 1.8 – 1.4 * 1.4 ) / (1.4 * 1.4) = 65.3%
I’d say the difference is in between 1/2 and 3/4 stops.
I have sigma 50mm F1.4 for my Nikon cameras, the lens is awsome, I will buy 85mm F1.4 for Canon