The old URL for the English page of Zeiss data sheets of all the Contax, Hasselblad etc. lenses doesn't work any longer. The new one is:
http://lenses.zeiss.com/photo/en_DE/service/download_center.html

The data sheet page have been updated to a new, pretty useless format if you ask me -- it was easier to find a particular lens with the old indexes.

The German page still has the old format and includes some sheets for lenses not present on the English page, like the Contax 100/3.5. http://www.zeiss.de/c12567a8003b0478/Contents-Frame/7d331e26befdd6f9c12570f500370493

Thanks for the link - I was looking for this the other day for Contax & Hasselblad - now termed "Historic Data" - I found a source that linked the PDF's without showing the actual Zeiss site - at a glance it looks very complete.

I was hoping someone would find these data. CZ simply removed the URL, very bad web design practice as it is very easy to arrange redirects, provide information to users. Their logs would tell them the pages are very popular...

The German page is far preferable to their 'graphic designer cool' new pages, which showcase the 'designer's' page layout 'talent' while ensuring a very long page with poor labelling and link titles that do not change state on rollover..all in sexy restrained black text. And they load oh so slowly...such is progress.

Another source, in case they do this again, is zeissimages.com, except they put the URLs in popups, sure to be blocked by many industrial firewalls.
URL: http://www.zeissimages.com/mtf.php

Thanks AhamB.

That's exactly what I was thinking, bad practice to just remove a URL of a popular page instead of using proper redirection.

Thanks ... shortcut on the desktop.