How clear was it?

I was at a friends place on the 40th floor looking south across the lake and enjoying the setting sunlight when he pointed and said, "You can see Niagara Falls today." Sure enough, I looked s-w and there it was. I could clearly make out the Skylon Tower and surrounding buildings. As the crow flies, that's about 50km. I didn't feel like going downstairs to grab my 100-400mm but I expect it would have picked it up cleanly.

 

Toronto Waterfront

Done