Recently I bought a pentax k5 body , a sigma 10-20mm wide angle lens and as a special treat to myself I bought the sigma 70-200mm f 2.8 lens. I love the perfomance of these two lenses.

I am dissapointed however by being unable to find a teleconeverter that works with the sigma 70-200 mm lens. I have birds that come to drink from a bird bath in my garden and I would love to take pictures of them without getting too close.

I have been advised to hand back the 70-200 and get a sigm 150-500mm. I dont want to do this. Is there any one who has had a similar experince out there?

Lucky you!!!

Recently I was shooting with my k200d with a sigma 70-300mm tlephoto lens coupled with 2x kenko telephoto converter. The camera stopped taking pictures. On the screen were displayed F--- AND 999.tHATS IT . This is not changing no matter waht I do. I then changed lenses and put on my 18-50mm lens - it worked !!- no camera jam. I put back the telephot lens and it would not work - same message ie F---, AND 999. WHAT IS WRONG WITH MY LENS OR WHAT AM I DOING WRONG?

I bought a set of macro tube extenders fro my k200d and cant make them work. My lens is a sigma 18-50mm(f3.5 - 4.5).I connetced the tube to the lens first and then to the camera body - no luck ! Waht am I DOING WRONG?