I've got a Horizon 35mm panoramic camera; one time I took it to a wedding, took a photograph of the couple exchanging vows, and the seemingly non-stop whirring and buzzing of the Horizon caused half the attendees to turn and stare. I've read of photographers being able to fire off a Widelux without the subject really being aware. So while my "loud" may not be your "loud," if you've used or been near a Widelux would say it's likely to draw attention for being noisy? FYI, I've got GAS and am looking at a Widelux F6. If someone has a nice one for sale, I'd be interested to hear from you.