See our example above in terms of the image quality:
- Wide lenses are usually expensive and come in
various focal lengths, either fixed or variable focal
lengths (wide-zooms). The main difference between a
wide lens with f/1.4 aperture and a wide lens having
aperture of f/3.5 or f/4 will be in terms of speed and
optical quality. Landscape photography needs very
deep depth of field to ensure the entire scene is in
focus. So buying a f/1.4 does not make sense as you
will have to stop down the lens anyway to achieve
the required amount of depth in the image. The same
would happen to the lens with the smaller aperture of
f/3.5 or f/4. The actual difference will show up only in
the image quality. The f/1.4 lens assuming its expen-
sive will feature better optics and lens corrections than
the cheaper wide lens. Although the cheaper wide
lens will not be disappointing and you will still get
good quality images. Differences can only be noticed
when same images are shot using two different wide
lenses and zooming in the images on a computer to
view minor details like sharpness and, vignetting and
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corner sharpness. If you plan on getting a wide lens
without breaking a bank, there are many third party
lens makers making brilliant wide angle lenses for all
major camera mounts.
24-70 @50mm 50mm @50mm