Originally posted by zzeitg I'm sorry to hear that your TC has a problem now...
This will be an off-topic question: what is your experience with this combo (1.4x TC + Sigma 150-500)? Has AF been working? And could you possibly share some shots made with this combo?
Yes, the 1.4x TC + Sigma 150-500 works very well on my K-3. Autofocus has been better than I expected and almost as fast as with the lens just by itself. The images are a tad soft compared to using it with the Pentax 300, but still pretty good.
Here's an image I took last summer of a Spotted Sandpiper.
https://flic.kr/p/oNie6f
Here's a Yellow-rumped Warbler from October 2014.
https://flic.kr/p/ptEct7
In both cases, I've done some post-processing and scaled the image to 2560 x 1440 to simplify publishing to my AppleTV.
Dave
PS: I attempted to insert the images and it didn't work, so I've just put the URLs in the message.