Been using the Canon 17 40mm F4 for sometime now with my landscape photography and absolutely love this lens. I also own the Canon 11 24mm which is super expensive.However I also use the Samyang 14mm F2.8 super wide lens and it is an astonishing performer for the price. Thank you for bringing this one to us.
Was at a location during a sunset. Every photographer was looking out toward the sun setting. But the real shot was when I turned the other way and caught the setting suns light on the clouds and landscape BEHIND me. Agree, do not focus on one obvious thing, look around.