WW1 Russian Lancers photo identification

[Hussar]

Hi,

Enclosed, you will find a photo to identify. Very difficult because if three of these soldiers are wearing under one shouder strap the typical Lancer's cords, why are they wearing crossed cannons on their shouder straps?

Thanks,

Richard

[Hussar]

[Hussar]

[McSeam]

The owner of the photo writes on the backside that thay are all cannoneers.

[Hussar]

Thank you McSeam!