Thanks Roni. I knew the picture from the cover of Sounes' biography (one of the several editions available), but I don't own it, so I couldn't check the credits. Maybe it was also published somewhere else, I don't know. But if you say it's a Montfort I believe you, no further proof needed :)
uh oh! I made a mistake!
There is a series by Montfort from the same time that has exactly this look and feel, the lightning, the perspective, the closeness - but this is NOT a Montfort-shot from this series!