Adapted EFS lenses on M100

Jianfei WANG wrote:

tobicy68 wrote:

Jianfei WANG wrote:

The Sigma uses ultrasonic motor drive where as the Tokina still uses an old style screw drive, so I definitely have a better chance shooting fast moving subjects with the Sigma over the Tokina. The focusing is accurate because it's the same camera with the same focusing system, but when your subject moves thats another story. So for still subjects, I'd say both are good enough, but for moving subjects, the Sigma will get you more focused shots.

Thanks for sharing. That is quite discouraged finding though as one of my main purpose of using M6 II is to shoot moving kids and pets.

I owned the Tokina 50-135mm f/2.8 and Sigma 50-150mm f/2.8 HSM back to back.  The Tokina maybe felt in little nicer in the hand, but in all other regards, the Sigma is a better lens.  As was mentioned, AF is quite slow and noisy on the Tokina.  The Tokina also has really bad purple fringing and is highly susceptible to flair.  If you shoot RAW, the purple fringing is easy to fix, but it makes a mess of JPEGs.  The Sigma has none of these issues and focuses much faster with the HSM motor (Sigma's version of USM).  The only downside to the Sigma is the sharpness from 125mm to 150mm.  From 50mm to 125mm, the Sigma is very, very good optically, but things fall off after 125mm.  Stopping down does help though.

One other small detail... Tokina lenses rotate in the Nikon direction whereas Sigma lenses rotate in the Canon direction.