We had this discussion on the old forum, but I thought it might be helpful to those who would like a super telephoto without spending fortune.
If anyone who wants to add to the thread, first post to a photo posting site such as Flickr, a full size image or at a minimum a 2000 pixel image. Then post a 500 px or less on this thread with all the Exif data, camera, exposure settings, and other settings for the lens/TC combo along with a description of how you captured the image. Include a direct link to the full size image on the photo posting site.
The purpose of this is to see how a TC with a good lens can actually be very useful. Please do not post a series of photos here, but simply one which shows the end product of the combo.
Let's see how this goes….