Why do wide angle lenses have f1.4?

Started Sep 25, 2013 | Discussions thread
peevee1 Veteran Member • Posts: 6,247
Re: Why do wide angle lenses have f1.4?

PaulD1980 wrote:

Thank you for your answers.

so for low light situations a wide aperture of f1.4 would be good at achieving a low iso but, with having such a wide open aperture at f1.4 this wouldn't be good for a night time landscape shoot due to shallow depth of field.

So the draw back of having a nice wide open aperture is you will have only a small portion of the image in focus?



Well, for night/low-light landscape, you focus 24/1.4 at 45 ft, and everything from 22ft on is in focus. Not so good indoors on in a cave or if you want foreground in focus, but from a high position (a building or a mountain) there is no foreground to worry about. Admittedly limited use, but still useful sometimes. More of the problem is that at f/1.4 these lenses are not sharp across the frame, so you'll need to be in really high-ISO situation not to stop down from there.

Nikon 24/1.4 @1.4

Canon 24/1.4L II USM at 1.4

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