And here is my second Contax lens. Looking for some time for best zoom in 2x-70/80 range I decided to buy Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85.
I made some comparision tests with best prime lenses. It looks that CZ 28-85 is very sharp wide open and sharp it means in the center and on borders and not so far from best primes. At 28, 35 and 50mm my Sigma 17-50/2.8 DC OS HSM is less sharp without any discussion. From 28mm till 35mm abberations (green fringle) is worse than in my prime lenses.
Lens is quite big and heavy. There are 16 elements inside. Lens has big front - 82mm filter size. Zoom is pump type and i found it to be quite usefull.
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/250s at 85.0mm f5.6 iso250
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/50s at 75.0mm iso160
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/250s f8 at 28.0mm iso160
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/160s iso200 full
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/100s at 85.0mm iso500
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/125s at 85.0mm iso200
Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/200s at 70.0mm iso250