I'm working on the design of an interpretive kiosk to be a promotional presence on the waterfront of Liberty State Park facing Manhattan. We wanted to include an interactive/interpretive aspect to this. I've been drawing and dreaming up an over-sized camera (perhaps looking like the iconic form of a field/studio camera) that you can walk into. This structure would integrate interpretive material about the physics and mechanics of lenses, the human eye and camera and photography. Drawing inspiration from other camera obscura this would differ in that we can't create a light sealed environment for viewing due to security reasons. I've been looking at creating a lens configuration that projects an image of the Manhattan skyline onto the back of a frosted or translucent imaging glass. We've created a simple and small mockup here using a video projector lens and projecting onto vellum. I'm looking at projecting an image of the skyline across the distance of 3 to 6 feet within a tube (oversized camera lens) I would like to keep this focal length small to keep the housing small but would also like an image of about 12 to 18 inches in diameter. Ideally, this lens configuration would allow a depth of field to accommodate focus on the skyline and on people in front of the 'camera'. I wondering if you can offer guidelines or suggest resources in designing an optical system like this. At this time, I want to create a full-scale mock-up of this and try it on the site where it is to be used. Can you suggest a starting point in selecting a lens size and type? I'm a complete novice at optics and would appreciate any help you can offer. Thanks Kent Gay Exhibit Designer Liberty Science Center Jersey City, NJ USA [log in to unmask] ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).