In article 2014041115085031216-savageduck1@REMOVESPAMmecom,
says...

On 2014-04-11 21:50:52 +0000, "J. Clarke" said:

In article 201404111226536915-savageduck1@REMOVESPAMmecom, savageduck1
@{REMOVESPAM}me.com says...

On 2014-04-11 19:02:18 +0000, nospam said:

In article , Paul Ciszek
wrote:

go find something that comes close to nikon's 14-24mm. you can't. even
nikon said it's better than all fixed focal length lenses in its range
(namely the ones made 20+ years ago) and independent tests confirm it.
the real kicker is that it's a zoom lens that's better than a bunch of
fixed focal length lenses, busting that myth too.

How does it compare for aperture?

it's a constant f/2.8

Do you actually understand what that constant f/2.8 means?
That is the maximum aperture which can be maintained over the entire
zoom range.
That fine Nikkor can be stopped down to f/22.

But it will never hit 1.4 or 1.2 or 1.0 or .95.

I guess that's what maximum aperture means in this case, f/2.8.

The question was "how does it compare to fixed focal length lenses" not
"what is the smallest aperture it can use".