PapaBob (and others), there is quite a collection of Panoramic WWI Canadian Expeditionary Force photos on the Digitized Manuscripts section of the British Library Website
Search with 'Canada' as the keyword and a date range of 1875-2000
This is the 86th Machine Gun Bn at Niagara
More info here:
Wonderful links Anna. Thanks.
Here's one of the fantastic panoramas.
On the British Library site they can be greatly enlarged - more so than this copy: