Schacht Travegon VS. other retrofocus wide angles

[Mos6502]

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

[luisalegria]

Angenieux preceded this Schacht (as the first ones came out before the introduction of the automatic lenses), and though it had a large front element, the 35mm was an f/2.5 with 6 elements. The Angeniuex formula does not look like a modified Tessar or triplet.

http://www.mwclassic.com/articles/agenieux/ageniuex.htm

[iangreenhalgh1]

I have the 4.5/35 Primagon. One of my favourite lenses, very sharp, great colours, loads of 3d pop, wonderful character to the images it draws. Needs a hood due to that large single coated front element.

I have several other 35mm lenses but the Primagon is the one I always chose. I have one that is better, a Konishiroku Hexanon 2.8/35, a really stunningly good lens. no idea of formula but it has a large front element like the Primagon too.

[Mos6502]