Originally posted by theCameraLens I am trying to decide if I would be better off with the Bigma or the 170-500 and the Sigma 2X APO conerter to use on my FA* 200 2.8.
I had the Sigma 170-500mm and traded it in for the Bigma.
I only used them in the range 400mm-500mm. In my opinion the Bigma is a bit sharper at 500mm, and auto-focussed more quickly. The Bigma is much heavier, built like the proverbial tank.
The Bokeh is not especially pleasing on either.
One thing to be aware of, is that there is no lens-lock on the 170-500 and if you carry the camera with the lens down it slowly extends and usually ended up around my knees. The Bigma has a lock to prevent this from happening.
dave