Ef-s focal length

Started Jan 15, 2013 | Discussions thread
JohnMatrix
Regular MemberPosts: 337
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Re: No...
In reply to brightcolours, Jan 17, 2013

brightcolours wrote:

JohnMatrix wrote:

brightcolours wrote:

JohnMatrix wrote:

i.e. does anyone make an f/2.8 rectilinear lens for a crop camera that'll give the same field of view as 14mm on FF?

just wondering

Why do you want an f2.8 lens? f2.8 on APS-C is equivalent to f4.5 on FF, by the way.

Why f2.8? For better subject isolation than a slower lens at the same focal length maybe, or to try and get the fastest shutter speed possible perhaps.

Also sorry but not sure why you brought up dof equivalency. I simply want to know if it's possible to buy a "fast" f2.8 rectilinear lens for a crop slr that gives the same field of view as 14mm on FF.

I brought up DOF equivalency because you brought up f2.8 (probably thinking of the f2.8 lenses on FF). If you want to have f2.8 FF like possibilities, you will need f1.8 on APS-C.

Nope, I was just enquiring about something faster than an f/4.5 APS-C zoom lens that covers the 9mm FL.

but thanks anyway.

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