The following pictures were made with a Canon 1D Mark II  /Canon 60Da and different optics.
several pictures were stacked by Registax or Gimp  

April 13, 2007, B/W Refractor 6/600, Canon 1D Mark II (6 pictures, 5 minutes each)
February 17, 2007, Zeiss 2,8/135 telephoto lens, Lumicon UHC filter,, Canon 1D Mark II (8 pictures, 3 minutes each)
March 18, 2020, 300 mm Zeiss lens, Canon 60Da
March 27, 2020, Vixen 102/f9, Canon 60Da