Aperture is one of the most fundamental and powerful tools you have at your disposal for controlling the look of your images. As such, understanding and mastering every property of it and consequence it has on your photos is crucial. This excellent video tutorial features an experienced landscape photographer giving a nuanced approach for choosing the right aperture for your images.
Coming to you from Christian Irmler - Landscape Photography, this insightful video tutorial guides you through his approach to choosing the right aperture for each of his images. It is common in the genre to simply set one's lens to as narrow an aperture as possible before diffraction starts kicking in and to adjust the shutter speed so that you can get a balanced exposure with said aperture and the lowest ISO setting. And while that will give you good images in a lot of situations, you might not be maximizing the image quality or using the optimal combination of settings for the conditions at hand. Check out the video above for the full rundown from Irmler.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."