The tip of the Western Hemisphere
The tallest freestanding structure of the Western Hemisphere is the Canadian National Tower, built back in 1976.
And the highest floor in the Western hemisphere is its Skypod.
From its 447 m.s.l., enjoy the majestic view on Toronto downtown and lake Ontario.
Wait for the the lights switching on the Gardiner motorway and roof top swimming pools …
… and enjoy the sunset. Pictures shot with a Nikon 16-35 mm and a 70-200 mm VR II. Click each picture to zoom in.
Astronomical calculations with Nikon D800: Mercury over the Sun and Jupiter moons
Today Mercury slid over the sun and I shot it with an additional infrared 850 nm filter. Mercury is at the bottom, a sunspot is visible on the Sun upper hemisphere.
A 70-200 VRII mounted on the 36 Mpx D800 gave a resolution of 2 pixels for Mercury passing over the Sun and 370 pixel for the Sun. Knowing the Sun is 1.64 times more distant than Mercury from Earth, the size ratio Sun / Mercury is 370*1.64/2 = 303.4 . Known the Sun diameter is 1.3914 million km, Mercury measures 4,586 km in diameter (the real value is 4,800 km).
The same camera setting gives a resolution of 12 pixels for Jupiter, which is 6.8 times more distant from Earth than Mercury. Therefore the size ratio Jupiter / Mercury is 12*6.8/2 = 40.8 . Calculated that Mercury is 4586 km in diameter, Jupiter is 187,108 km (its real size is 143,000 km). More or less …