Web Analytics RiceHigh's Pentax Blog: Nine Most Special Lenses Built Ever

Sunday, April 17, 2011

Nine Most Special Lenses Built Ever

http://qicai.fengniao.com/190/1904260.html
(in Chinese, Google Translation to English Here)

1. Zeiss Sonar T* 1700mm F4



2. Canon EF 1200mm F5.6L



3. Sigma 200-500mm F2.8



4. Canon 5200mm F14



5. Carl Zeiss Planar 50mm F0.7



6. Canon S 50mm F0.95



7. Leica Noctilux-M 50mm F0.95



8. Nikkor 6mm F2.8 Fisheye



9. Sigma 4.5mm F2.8



There is no Pentax lens included, though. But if you want to see those Pentax oddities, read the following:-

http://www.aohc.it/oddse.htm
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Moritz Schwertner's avatar - Go to profile

Moritz Schwertner · 728 weeks ago

Just FYI, Kubrick didn't use the Zeiss f/0.7 but the f/0.5 for his Movie "Barry Lyndon". I don't know if this is just caused by Google's bad translation but this Article is somewhat poorly researched and somehow pointless for a Pentax Blog (though nonetheless entertaining and interesting).

Greetings from germany,

Moritz Schwertner
http://www.moritzschwertner.de/ http://www.photoodyssey2011.com
4 replies · active 728 weeks ago
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Zebooka's avatar

Zebooka · 728 weeks ago

f/0.5 is the theoretical limit for lens. There were no such lens made by anyone yet.

Kubrick used f/0.7 lens indeed. http://en.wikipedia.org/wiki/Barry_Lyndon

[quote]

After "tinker[ing] with different combinations of lenses and film stock," the production got hold of three "super-fast 50mm" f/0.7 lenses "developed by Zeiss for use by NASA in the Apollo moon landings," which Kubrick had discovered in his search for low-light solutions.[1][3]

[quote]
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Chris's avatar

Chris · 728 weeks ago

Can you point me to some literature on the theoretical limit? I don't really understand what physical effect should cause that limit.
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RiceHigh's avatar - Go to profile

RiceHigh 110p · 728 weeks ago

The maximum limit of aperture is limited by the opening diameter of the mount and the back focus register distance (and of course the focal length of the lens as well). Practically, Zebooka is right that there is no lens on Earth ever had a f-number faster than f/0.7, which seems to be the world record so far.
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Chris's avatar

Chris · 728 weeks ago

Practically, I believe you. But what I was asking, is it true that there is a theoretical limit of f0.5? (I do not see what physical effect would cause this limit)

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