Sigma 150-500

Anybody used this with a Sigma TC? If so, was it worthwhile?

Dave

Unless I'm reading the chart wrong, the Sigma TC are not compatible with the Pentax version 150-500. link

I've used it with the Kenko 1.5x and it autofocuses and gives results somewhat better than expected in good conditions.
Dave

Barrie, you are quite right so perhaps I should be asking if anybody has used with any TC?

Dave

Basic test on K5 and Kenko1.5 - 500mm f6.3 1/800 TAv - JPEG straight from the camera.

Thanks for taking the trouble to post these shots Barrie. I'm seriously considering a 150-500 purchase, hence my interest in the TC.

Dave

I should have said they were hand held. I think it's the in lens OS that makes the difference, having tried the 170-500 and TC in similar conditions without much success.

I have the Kenko 1.5x TC (with SDM /HSM contacts) which I have used a few times with my Sigma 50-500mm in good light and it works well. The in-lens OS really does a good job and allows good results handheld, as long as I don't go all the way to 500mm on the lens.
Must stress though that good light is needed for focus lock on the subject.