I have a Sigma 50-500 and its a great lens. However, it has been plagued with problems, I had to have it stripped down as a screw fell out of the back of the lock and wedged into the barrel and it has never been the same since with several problems. Now the
AF has stopped working and Im not willing to throw any more money into it.
While it seems its strong and sturdy, it really does not seem to be designed for daily use that I give it. But the versatility of that focal length with the quality of images, it has become indispensable to me and would like a another, just the newer model with the
OS.
I cant afford to buy new, but there seems little available second hand at a reasonable price, the 50-500 seems to carry a premium of $4-500 over the 150-500, of which I have found several locally in the $650-750 range.
The 150 is too wide really for the conditions at my local airport, but I have an 18-200 too which I can also (reluctantly) use (unless right up close the image quality is night and day from the Bigma). I then saw on ebay 150-600's for sale at a similar price to the 150-500. If I am going to disadvantage myself starting at 150, I figure I might as well gain an extra 100, so the question is - do you really and has anyone had any experience with that lens?
As an aside, is it
OK buying something like that on ebay? The origin of most seems to be Japan or Korea (I am in Canada).