<p>As many of the responses here have already said, a fast lens isn't important for a wide angle lens, especially for landscape. If you need a steady shot in low light, you can use a tripod. In daylight, a faster lens for landscapes is usually unnecessary, especially if you want to experiment with long exposures (in which case you'll often need an ND filter anyway.)<br>
Here's some more info for you on the topic of wide angle lenses: http://www.shotkit.com/best-wide-angle-lens/<br>
Good luck with your hobby!</p>