HP ScanJet 4670 See-Thru Vertical Scanner

In this article, I’ll introduce you to the basic elements that you can use to control exposure in your shooting. If you have a digital SLR, there will be a way to set all of these controls on your camera, but since they differ between manufacturers and models, you’ll need to refer to your camera’s manual to find out exactly how to change them. All cameras, whether an ancient film camera, or a more modern digital, work in pretty much the same way. Photographs are taken by letting light fall onto a light-sensitive medium, which records the image. Traditionally, this has been film, but more recently, it tends to be a digital sensor. The more light that falls onto the film or sensor, the lighter the image. Put simply, a camera consists of a light-tight box that stores a light-sensitive device (either a film or a digital sensor), a lens that magnifies and focuses the image onto that light-sensitive device through a hole in the box (called the aperture) , and a shutter that opens ...

There's a lot of debate today about the safety of using cell phones while driving. Statistics show that those who use cell phones while driving cause a much greater percentage of accidents than those who avoid using their cell phones. And the studies have shown that it's not just the physical coordination required to punch numbers into the cell phone while you're trying to work the vehicle that causes accidents; it's actually the lack of attention resulting from driving and talking on the cell phone at the same time. It seems that when you're distracted, you're more likely to cause accidents. In terms of public safety, it's probably correct to say that banning cell phones would reduce the number of traffic accidents. But I think, more accurately, it depends on the person. Some people are operating on, shall we say, lower power CPUs in their heads to begin with. They might be zoned out on prescription drugs, and when you add a cell phone to the equation, they do become a danger to the ...