When it comes to the Queen, a pair of ordinary 3D glasses just won't do. For her visit to Pinewood Toronto Studios, her majesty brought her own customised set with Swarovski crystals forming the letter Q on the sides.

Angela Kelly, the Queen's dresser and personal assistant, came up with the extra trimmings for the glasses during the state visit to Canada.

The Queen watched a short scene set during the early 19th century being filmed. It was directed by Deepa Mehta, and consisted of a group of dancers in period costume gyrating to loud Asian Bhangra music for a few minutes.

The Queen then moved into another part of the large warehouse, where a screen had been set up to show the 3D footage which had just been filmed.

John Reeve, a stereographer with the Toronto-based firm 3D Camera Company said afterwards: "I told the Queen how the camera works – they are very large in order to mimic the space between the human eyes – 65mm."

Reeve added: "I think the Queen liked the glasses and the Duke seemed more interested in the crane holding the camera. He spent more time watching that than the dancers during the filming."