I've seen references to f1.2 lenses. I was wondering, are there any faster lenses available for a DSLR mount?
are there any faster lenses available for a DSLR mount?
To answer your question, not really, though it's possible to argue based on your definition of DSLR and your definition of available.
If you relax your definition of DSLR to digital rangefinders, then yes, you can include the Leica Noctilux, which is still in production. And if you relax your definition of "available", Canon made a 50 f/1.0 for the EF mount which can be obtained second hand. There are also many more fast lenses that can be mounted via an adaptor.
But practically, the fastest production DSLR lenses are the Canon EF 85mm f/1.2L and EF 50mm f/1.2L, and the manual Nikon Nikkor 50mm f/1.2 AIS.
Carl Zeiss 50mm f/0.7
Leica also makes a 50mm f/1.0 lens which is actually available it seems and might be more ...usable. http://lensbuyersguide.com/en/lens/show/Leica/NOCTILUX-M_50mm_f1.0
There is also 50mm 0.95 lens from Noktor for Micro 4/3rds.
(photo from the noktor website)
Micro 4/3rds is a mirror-less system so it is not a real DSLR lens as such, but it seems that there are also planning to make models for other mounts as on the main page there is a product survey: "What mount would you like to see lenses designed for?" with options:Canon EF,Nikon F,Four Thirds and PL Cinema Mount. Hard to say if they would manage to make it equally fast for other mounts
As far as I know, the fastest lens (that is actually availabe) is currently the leica 50mm f/0.95
For me, the fastest lense was the 50mm f/1.0 from Canon, but it's discontinued now.
Otherwise I agree with chills42, but Leica Ms are not DSLRs.
The Zeiss 50mm f0.75 cannot be mounted on an SLR, as the rear element would hit the mirror. The fastest ever SLR lens would therefore have to be a customised 65mm f0.75 Astro-Berlin Tachon (Sonnar design).
Rayxar makes lenses with f1/0.75 apertures.
Cosina has a f/0.95 lens Micro 4/3 mount - Voigtlander 25mm f/0.95 Micro 4/3 Nokton