I have entered the world of Carl Zeiss lenses the easy way, a great find at the flea market. The lenses perform well and will probably perform even better when I've really gotten the hang of the Exakta. I often see posts on various websites about Carl Zeiss lenses being used on the current crop of DSLRs, usually with a lot of enthusiasm flavoring the post. My question is this; how do the old Carl Zeiss lenses compare to the newer ones, and are they worth bothering to mount on a current camera? I did happen to see an auction on the big auction site for a CZ lens for an Exakta, but the picture was of the lens, something along the lines of the Biotar, mounted on a Canon 20D. Would that be worth the trouble or are the newer lenses so much better that there's no comparison?