Noktor Hyperprime 12mm = Kowa 8mm + teleconversion?

Started Oct 5, 2011 | Discussions thread
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blofelder
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Noktor Hyperprime 12mm = Kowa 8mm + teleconversion?
Oct 5, 2011

Noktor/SLR Magic Hyperprime 12mm f1.6 is most likely based on Kowa 8mm f1.4 C-mount lens with custom teleconversion to enlarge the image circle. What puzzles me is how did they manage to keep the light loss so minimal? Astonishing! F-stop should be around f2 with that amount of teleconversion...

Original Kowa 8mm lens has claimed 120 lp/mm resolution at center and 80 lp/mm in corners. Custom teleconversion means more lenses, so final resolution is most likely lower than that.

Sources:

http://machinevisionstore.com/Catalog/Details/134

http://www.uniel-denshi.co.jp/CCTV-LENSES/KOWA/LM8HC.html

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