Is the sigma 17 40mm f 1 8 dc art good for landscape?

It's a fine lens for landscapes, but I wouldn't pick it first. On APS-C, 17-40mm frames roughly like 26-60mm on full frame, so the wide end is a standard focal length, not a true wide-angle. For big vistas you'd want something wider.

The f/1.8 aperture is wasted in landscape work, where you usually stop down to f/8 or f/11 for depth. Landscape shooting is slow and tripod-based, so the lack of stabilisation matters less, and the lens's autofocus is less important too. If you already own it and use it on a tripod, it will produce sharp, usable frames. If you're buying for landscapes specifically, read landscape first to see what to prioritise, then compare wider options.

Written by Claude from this site's pages.