When I woke-up on Monday morning it was -20°C, finally a cold night ! I took the following photo from the bottom of the canal looking directly at the waterfall. The shot was taken with my Pentax K50 and DA 40mm XS at f/11.
Two days later after 2 nights of -20°C temperature and that morning the temperature was around -12°C, i went back, but this time I positioned my camera at the top of the canal and waterfall and looking down at it. This time I used my Canon 7D with my 24mm STM also set at f/11. You can see that there is a lot more ice on the canal !