Posted: Sat Sep 15, 2012 8:41 am Post subject: Schacht Travegon VS. other retrofocus wide angles |
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Mos6502 wrote:
I recently picked up another Schacht Travegon, this time in automatic Exakta mount.
The Travegon is interesting to me because it was the first retrofocus wide angle lens with a small front element. As compared to the Primagon, Lithagon, Culmigon, et. al. which all used a very large front element for the equivalent speed - or even for a slower lens. What I want to know is, what other wide angle lenses used the Travegon formula? Because it seems unique amongst 1950s wide angle designs. Whereas the others added some elements in front of a tessar or triplet, the Travegon uses six elements in three groups... did any other companies use this formula in that era? Or even later? I'm quite curious to find out.
Here's an example of the typical approach to a 35mm for the era: Primagon, triplet with a very large fourth element out front.
Meyer Primagon 1:4,5/35 mm by alf sigaro, on Flickr |