Best wide angle lens for the canon eos 77d?

For the 77D, I'd start with the Canon EF-S 10-22mm f/3.5-4.5 USM. It's made for crop bodies like yours and frames like 16-35mm on full frame, which is plenty wide for landscapes, architecture and tight rooms.

If you shoot indoors or in dim light, look at the Sigma 14-24mm f/2.8 DG HSM Art. It has a constant f/2.8 aperture across the zoom, so it stays bright as you go wider, and it frames like 22-38mm on your camera.

For a wide, fast prime option, the Sigma 14mm f/1.8 DG HSM Art frames like 22mm and lets in a lot of light, though you'll need to move your feet to change the view.

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