Patent: Canon EF 11mm f/4 Optical Formula

[TeT]

If really want wide, forget 11 mm and go to 6mm f/2.8. Sure, its a fisheye, but 6mm!

Wow 220° viewing area; who needs a mirror...

 

[GMCPhotographics]

F4 seems a bit narrow for a Canon prime, unless it's for an M camera.

Sorry...I'm not understanding what you mean by narrow....are you talking about the f4 aperture, the thinness of the lens barrel or the angle of view?

The F4 aperture seems a bit narrow for a prime lens, especially if it's going to be an L lens.

The TS-E 17L is f/4.

So the fabulous but often forgotten about ef 8-15mm f4 L fisheye. It's one of favorite lenses....even if it is a 2 trick horse.

 

[neuroanatomist]

F4 seems a bit narrow for a Canon prime, unless it's for an M camera.

Sorry...I'm not understanding what you mean by narrow....are you talking about the f4 aperture, the thinness of the lens barrel or the angle of view?

The F4 aperture seems a bit narrow for a prime lens, especially if it's going to be an L lens.

The TS-E 17L is f/4.

So the fabulous but often forgotten about ef 8-15mm f4 L fisheye. It's one of favorite lenses....even if it is a 2 trick horse.

Not forgotten...but not a prime lens.

 

[TW]

F4 seems a bit narrow for a Canon prime, unless it's for an M camera.

Sorry...I'm not understanding what you mean by narrow....are you talking about the f4 aperture, the thinness of the lens barrel or the angle of view?

The F4 aperture seems a bit narrow for a prime lens, especially if it's going to be an L lens.

The TS-E 17L is f/4.

And the 300 f4, 400 f4, 400 f5.6, 500 f4, 600 f4, and 800 f5.6

 

[et31]

A 1mm f/0.7 lens is the only way to go!
Physical and mathematical constraints may be a problem, but I'm sure that a compromise can be met.

Who would like to engineer a 14mm f/0.7 lens? It would be worth at least a few $,$$$'s

 

[applecider]

To beat a dead thread, for stars capes it is nice to have an f2.8 or bigger aperature as this allows a thirty second shot at iso 3200 or so which is good exposure for most star scenes.

Of course lenses like the Rokinon 24 f1.4 allow for like 8 second exposures at 3200 or the chance to move to 1600 iso for 20-25 Sec and get a little exposure to the right. Longer exposures don't always work here because then one gets star trails instead of points.

With an f 4.0 lens a thirty second exposure with an iso of 6400 comes close to the right exposure, but noise starts to pile up" and longer exposures bring tails

So please design us some 11-16 mm primes with f2 or larger aperature said. The new 14 rumored from Rokinon at f=2.4 promises what a half to quarter stop improvement