Classic Lens Designs
Okay, I keep looking for a nice Zeiss solid-body viewfinder camera. Thing is there are just too many lens types out there. Sometimes I think it be nice to get a Voigtlander Vito or something like that BUT the number of lens names is dizzying. Which one exactly, is supposed to be the equivalent of a four elements in three groups?
Wonder no longer. Here is a list of lens - you can figure which Schneider or Voigtlander design is the equivalent of whichever Zeiss design!
The Biotar lens I bought today would be six elements in four groups.

Unless, of course, he says, I plan to blow my negatives up four feet by four feet.
Anyhow, a recent article/sale announcement at Japan Exposures regarding a boutique design triplet has me thinking about being open-minded about triplets as well.
Certainly, Pentax Espio Mini's (aka UC-1, seen above) have done okay with just three elements.

1.Agfa Agnar 1:6,3; 1:4,5; and Agfa Apotar 1:4,5; 1:3,5
2. Zeiss Novar 1:6,3; 1:4,5; 1 :3,5
3. VoigtlƤnder Vaskar 1:4,5
4. Steinheil Cassar 1:4,5; 1:3,5; 1:2,8
5. Schneider Radionar 1:4,5; 1:3,5; 1:2,9
6. Agfa Solinar l :4,5; 1:3,5; 1:2,8
7. Zeiss Tessar 1:3,5; 1:2,8
8. Schneider Xenar 1:3,5; 1:2,8
9. VoigtlƤnder Color Skopar 1:3,5
10. Schneider Xenotar 1:2,8
11. VoigtlƤnder Ultron 1:2,0
12. Rodenstock Heligon 1:2,0
13. Schneider Xenon 1:2,0; 1:1,9
14. Zeiss Biotar 1:2,0
15. Zeiss Sonnar 1:1,5
16. VoigtlƤnder Nokton 1:1,5
3. VoigtlƤnder Vaskar 1:4,5
4. Steinheil Cassar 1:4,5; 1:3,5; 1:2,8
5. Schneider Radionar 1:4,5; 1:3,5; 1:2,9
6. Agfa Solinar l :4,5; 1:3,5; 1:2,8
7. Zeiss Tessar 1:3,5; 1:2,8
8. Schneider Xenar 1:3,5; 1:2,8
9. VoigtlƤnder Color Skopar 1:3,5
10. Schneider Xenotar 1:2,8
11. VoigtlƤnder Ultron 1:2,0
12. Rodenstock Heligon 1:2,0
13. Schneider Xenon 1:2,0; 1:1,9
14. Zeiss Biotar 1:2,0
15. Zeiss Sonnar 1:1,5
16. VoigtlƤnder Nokton 1:1,5
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