Ultra-wide angle lens.
Extra-wide angle lens, usually those with an angle of view greater than 90°. For 35 mm cameras the description usually applies to lenses of shorter focal length than about 24 mm.
ULTRA-WIDE ANGLE LENS - An extra-wide angle lens. Generally refers to 35mm camera lenses with focal lengths shorter than 24 mm.
Ultra-wide angle lens giving 180 angle of view that produces a circular image on 35 mm, 5-9 mm lenses showing whole image, 15-17 mm lenses giving a rectangular image fitting just inside the circle, thus representing 180 across the diagonal.
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16mm ultra-wide angle lens - sunset near Death Valley, California, USA
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All the ultra-wide angle lenses suffer from some amount of barrel distortion.
Fisheye Lens Ultra-wide angle lens providing a near 180 angle of view. Fisheye lens produces a rectangular image fitting inside the circle, with highly distorted scene elements.
The first thing one notices about such a lens is that it is a 12-24mm zoom, something absolutely unheard in the realm of ultra-wide angle lenses.
An ultra-wide angle lens which purposely introduces barrel distortion so straight lines near the edges of the frame appear to curve out.
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A 24mm ultra-wide angle lens with 5x Optical Zoom gets more in your shot, like that family vacation at the Grand Canyon or the Empire State Building while Optical Image Stabilization ensure blur free images at full telephoto. The 14.
So, instead of packing an ultra-wide angle lens, I’ll use my kit lens to take photos and stitch the images together later. I’ve made panoramas on everything from my Canon 5D Mark II to my various Canon Powershots.
Ultra Low dispersion lens, pls refer to ED, LD sections.
Ultra-wide angle lens. ...
In my experience, most landscapes are done with wide or ultra-wide angle lenses.
 See also: Wide angle, Wide angle lens, Lens, Focal, Image
  
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