I recently had the chance to shoot some stills and time-lapse from the City Center in Las Vegas.
To make shooting through the double glass windows easier we used Lenskirts. The LENSKIRT is a portable, flexible hood which you attach to the end of your camera lens. It allows you to shoot pictures / video through glass without internal environmental reflections such as yourself, room lights, camera flashes, light leak from under a door. . This makes it the ideal tool for shooting time-lapse or video from behind glass. It was designed by cinematographer Frank Glencairn and is sold by LetusDirect.
The concept is pretty straight forward, but the product is very well-made. The unit sells for $49 at http://www.lenskirt.com and Ive already picked up 2 for my kit.
The resulting view was great. The above shot was a 3-second exposure and there’s no reflection.