Zoom lens . Zooms in digital cameras are not alike. Optical zoom lenses are true zoom lenses they move as you zoom without a loss in image quality. Digital zooms don't move the lens. That usually results in a loss of image quality, which you may not notice when you are viewing pictures only on the Web, but will probably notice when printing an enlargement.
Some cameras offer both optical and digital zooms.
Before you use the digital zoom, you may want to use your feet as a zoom lens, and take a few steps closer to your subject. Battery type . Some camera batteries went dead after just a few minutes. Many of today's digital cameras use rechargeable batteries that don't need recharging so quickly. That's due to battery design and improvement in camera power consumption.