What is the Largest aperture lens in the world?

Started Jan 19, 2009 | Discussions
fastap Regular Member • Posts: 132
What is the Largest aperture lens in the world?

What is the Largest aperture lens in the world? would it be possible to convert it to EOS mount?

voodoo1694 Regular Member • Posts: 145
Re: What is the Largest aperture lens in the world?

Correct me if I'm wrong, but I believe it's the Leica Noctilux-M 50mm f/0.95 ASPH lens

CanonKen Senior Member • Posts: 2,923
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pikeface Contributing Member • Posts: 533
Physically

it could be these

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tkbslc Forum Pro • Posts: 15,829
Re: Physically

Canon made a 50mm F1.0L

http://www.flickr.com/photos/mrbokeh/3038998368/in/pool-43936001@N00

There was a post recently about an FD mount Canon 50mm 0.95, but you'd have to use a conversion adapter and lose .5 stop of light (or infinity focus). Then the 50mm 1.0 wins.

Photo_AK
Photo_AK Senior Member • Posts: 1,228
Re: What is the Largest aperture lens in the world?

Here Bjørn Rørslett writes about 50/0.75, 75/1.1, 85/1 ... fast lenses:

http://www.naturfotograf.com/index2_PC.html

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Andrew dB Contributing Member • Posts: 970
Stepper lenses
1

fastap wrote:

What is the Largest aperture lens in the world? would it be possible
to convert it to EOS mount?

Probably any number of specialist repro lenses built for making microchips and used in so-called 'steppers', which can be as fast as f/0.53 (0.95 NA) and cost millions of dollars each.

They are designed for focusing specific wavelenghts of UV light produced by lasers and they wouldn't be the kind of thing you could fit to an EOS camera even if you wanted to. These days the cutting edge is moving over to mirror rather than lens optics but they wouldn't work on EOS either.

OP fastap Regular Member • Posts: 132
Re: Stepper lenses

What do you mean moving to mirror rather then lens optics?...a cheaper way around making good optics or?

Chris59 Forum Pro • Posts: 15,437
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Look them up in Google.

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Andrew dB Contributing Member • Posts: 970
Re: Stepper lenses

fastap wrote:

What do you mean moving to mirror rather then lens optics?...a
cheaper way around making good optics or?

From reading the linked article ( http://www.asml.com/immersion/eng/source/lens_images_fall05.pdf ) it looks like the main benefits at the moment are:

smaller optics
less dependant on material quality than transmission optics
less vulnerable to misalignment

mirrors can be cooled on their rear surfaces making it easier to avoid heating effects than with lenses.

Additionally, as you get to shorter wavelengths of light, it becomes harder to use transmission optics to achive focussing. Nearing Extreme UV or X-ray wavelengths, mirrors become the only option.

maiaibing Veteran Member • Posts: 5,139
List of several of the fastest "standard" photo lenses
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(unknown member) Forum Pro • Posts: 13,144
Cool, it's already an EOS mount lens

!!!

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