A little sad, but a little richer
I sold my Sony A100 with 3 Minolta lenses yesterday. A week ago I sold my 135mm F1.8 Zeiss sony lens. I have had great success with my Sony a100 camera in the past, but over the last year or so I have not used it at all. I hope the new owner gets a lot of use out of the camera. It was also my first DSLR.
The Zeiss lens is somewhat of an enigma. It is the best glass out there period. As far as quality goes there is no better lens out there, not for Sony, not for Canon, not for Nikon or any other make. The only ones that may disagree have not used one. The problem is (for me anyway) is its focal length. It is too long for landscape. It is too long for portraits (ideal length for portraits is 75-105 mm). It is too short for wildlife for which you need 400mm or more and for any kind of bird shooting you need 600mm, or its equivalent if you are using an APSC camera.