Originally posted by Topsy #3 is sexiest (okay, it simply stands out the most, but the lens look sweet from this angle!)
It's something East German, but I can't quite make out what it is.
#1 Takumar 105/2.8.
#2 Auto Weltblick 35mm. (Not sure on aperture.)
#3, see above.
#4 Guessing it's a Meyer Orestegon 29/2.8, based on the fact it doesn't look quite like the next one, which is...
#5 Meyer Lydith 30/3.5.
Which would also give differences of:
#1: telephoto, made in Japan lens*
#2: auto aperture, only rebadged lens
* #2 is quite likely also made in Japan but it's impossible to say 100% as no one has ever conclusively determined who made the Weltblick lenses.