You asked
Best wide angle lens for the canon eos 750d?
For the 750D, I'd start with the Canon EF-S 10-22mm f/3.5-4.5 USM. It gives a 16-35mm full-frame equivalent, which covers most wide-angle work, from landscapes to interiors.
If you want image stabilisation, the Canon EF-S 10-18mm f/4.5-5.6 IS STM goes a little wider at the short end, but it's a slower lens.
For a faster option, the Sigma 14-24mm f/2.8 DG HSM Art stays at f/2.8 across its range and gives 22-38mm equivalent. The Tamron 10-24mm f/3.5-4.5 Di II VC HLD reaches wider, to 16-38mm equivalent, and has vibration control.
If you're new to aperture, the lenses guide explains why f/2.8 costs more than f/4.
Written by Claude from this site's pages.