Lenses and Optics
I was pretty excited when I first heard about the Rokinon Xeen line of Cinema lenses. For several years now, Samyang / Rokinon photography lenses have given photographers with reasonable expectations some superb alternatives. They sell optically excellent lenses at amazingly low prices. There are compromises made to accomplish this goal, of course, but they […]
Equipment
We’ve spent most of the last month establishing a database of MTF curves and expected copy-to-copy variation for a number of lenses. Most people have a general idea about what we’re doing, can follow along the basics of MTF curves, etc. But many other people also have a very good question, “How much of a […]
Lenses and Optics
Finally, the last in our series of MTF and variation tests is here. We’ll be doing these going forward as new lenses are released but for now we’ve got a nice database of common lenses that we can measure others against. We’ve completed almost all of the common prime lenses, along with wide and standard […]
Lenses and Optics
We recently published the MTF and variation curves of standard range lenses and now are going to tackle wide-angle zooms. As we’ve seen, zooms have more variation than primes and wide-angle primes have more variation than standard range primes. Also, the MTF curves of wide-angle primes are weaker off-axis than standard range primes. So my […]
Equipment
Last week, Roger had the unique opportunity to get a single copy of the Sigma 24-35mm f/2 Art Series to test the sharpness up against the most common lenses in the 24mm and 35mm focal range. When Roger was done with his tests, and showing off his results, I had the opportunity to bring the […]
