Most of the digital cameras within the mid-priced range include a 3x/4x lens - the first number refers to the optical zoom with the second number referring to the digital zoom. A few of the lower-end priced cameras have only a digital zoom, but their photos are rather dull and slightly fuzzy. The zoom effect in a digital camera is similar to, yet different, from that of a conventional camera. It brings distant subjects closer.

However, in a digital camera there are two kinds of ‘zooms’. The first is similar to that of a conventional camera and is known as the optical zoom. The second is the digital zoom, and is more interesting. It ’simulates’ optical zoom by enlarging a portion of the image that is the digital zoom selects a portion of the photograph and blows it up.

The zoom effect should not be confused with photo editing, where an image editing software is used to crop and blow a picture on a computer screen. Cropping a picture can refer to enlarging the main subject, or an area of choice - thereby eliminating the remaining parts. Another misconception associated with digital zoom is that it is very handy in capturing long distance images. Nothing can be more misleading. Optical zoom matters more in a digital camera. Read the rest of this entry »

Today, digital security cameras are increasingly used in our society, homes and offices. Small in size and easier to install, they give sharper images.

Different models of digital security cameras are available in the market. They include wireless digital security cameras, color digital pen-type mini cameras, security system with indoor and outdoor cameras, security first fas-1248, pelco digital security cameras, and e-mobile-cameras. Wireless digital cameras are smaller, light weight and professional quality devices.

They have higher sensitivity and saturation signal. They are powerful and easy to install and operate. Color digital pen-type mini cameras have multifunction software, USB cable, tripod and AAA batteries. Security first fas-1248 cameras have 14 inch black and white monitor with built-in real-time quad processor. Pelco digital security cameras have a compact body style. They have digital signal processing and auto white balance. E-mobile-cameras are digital security camera systems for vehicle, retail or secret use. Read the rest of this entry »