Why do wide angle lenses have f1.4?

Started Sep 25, 2013 | Discussions thread
AlbertTheLazy Veteran Member • Posts: 7,139
Re: Why do wide angle lenses have f1.4?

Not all W/A lenses are f:1.4. My most-used 18mm (27mm FF equiv) is an f:2.0, for example and I've got a 28mm f:2.8 on one of my 35mm film cameras.

There are reasons why someone might want the wider aperture (low light shooting, subject separation via shallow DOF ...).

The only reason I can think of for using a very wide aperture lens for landscape work is if you are into using strong neutral densities, especially on a DSLR. A 4 stop ND on an f:1.4 would look like an f:5.6 through the viewfinder, so you'd still have a reasonable chance to see what you're shooting, rather than setting up without the ND and only attaching it just before shooting.

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