Need Good Wide Angle Lens for Yosemite

My apologies for the confusion on my sloppiness/common practice usage. I'm not the only one that may be cavalier in this terminology, here are two other examples (and there are many more):

“The field of view (which is what "wide" is all about) is actually determined just as much by format size as by focal length.”

One can find this quote along with more information of focal length, field of view etc. at

http://www.bobatkins.com/photography/tutorials/crop_sensor_cameras_and_lenses.html

And this quote is from Wikipedia

“The smaller APS-C sensor effectively minimizes the field of view by about 1.5, so that a 300mm lens has the same field of view as a 450mm lens on a 35mm”
http://en.wikipedia.org/wiki/APS-C

I also made an assumption which I did not confirm that the 16mm lens discussed was designed for full frame camera. I hope this helps understanding my use of Field of view. There are many sources that can elaborate and hopefully clear up any misunderstandings.