[miro]

I remember that some of their technically good lenses - such as the 300/4, 400/5.6, 135-400, 170-500, 300/2.8 had a tendency of losing their front-elements in hot weather. The glue of the duct tape which was being used to hold it in place got soft.

Ah well, the good ol times when photography was still an adventure ... ;-)

Eh good old times.

BTW Why they don't re-use the the"genius" Canon idea.  Paint all flourite leneses in white :-)

or there ware patent issues for such stupid solution.