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A list of fast lenses on wikipedia: http://en.wikipedia.org/wiki/Lens_speed#Fast_lenses http://en.wikipedia.org/wiki/Lens_speed#Fast_lenses There are several le

by cuu508 13y ago

A list of fast lenses on wikipedia: http://en.wikipedia.org/wiki/Lens_speed#Fast_lenses http://en.wikipedia.org/wiki/Lens_speed#Fast_lenses There are several lenses around 0.7, and some with even lower f-numbers.

nknighthb 13y ago
They don't appear to be commercially available, and some of them seem rather special-purpose.
- jychang 13y ago
  Most are for XRay imaging.
  - ams6110 13y ago
    They don't necessarily do a terrible job at optical imaging though. http://forum.mflenses.com/viewtopic.php?t=50166 http://forum.mflenses.com/viewtopic.php?t=50166
- RyJones 13y ago
  And one of them is a hoax.