Megapixels of a camera is very important, but do not rely on that only. Because a camera’s quality does not depend on megapixels only. Although high resolution is useful if you want to print enlarged photos you captured. Camera with 5MP is quite enough to produce 5×7, 9×10 inches print while many budget digital cameras offer 10MP.
As you know cameras magnification capabilities defined by optical zoom or digital zoom. But digital zoom does not really matter as it reduces the image quality while zooming. It crops the image and put that cropped area on full screen. This may cause image to get blurred. But on the other hand optical zoom changes the position of camera’s lenses, so there is no damage to the image quality.
Built-in image stabilization can help you to avoid any blurriness that can caused by shaking hands, moving vehicles etc. Only some budget digital cameras have image stabilization while more expensive professional cameras use mechanical image stabilization.
Design and durability are very important for a digital camera regardless of the price. A lightweight plastic or metal cover is strong enough to endure typical falls that can occur.
Other features such as face detection, night mode can be very helpful in taking photos. Typically budget digital cameras need more light than other professional cameras in order to take high quality photos. Face detection feature can detects around 8 faces at the same time to keep those areas sharp and with optimum exposure.
It is very unlikely you find a budget camera with a viewfinder while many of these cameras designed to use with standard AA batteries or custom rechargeable battery.
Source Article : http://bestcamerasstore.wordpress.com/2013/09/17/what-to-expect-from-a-budget-digital-camera-under-100/