Bed Frame Queen Instamatic Provides Your Bed with Perfect Support. The Mantua bed frame queen instamatic has extremely durable features, including a 1.5-inch angle iron construction that cradles your bed's foundation so it does not shift. A double angle support beam runs down the middle to prevent sagging.
Quora User, Digital photography since 2003... Optical zoom is a variable focal length lens, like a 15-85mm or 25-200mm lens. In an APS-C sensor DSLR camera, the standard or prime focal length is 35mm. Any focal length lower than this is called wide angle range. All the focal lengths above 35mm are called tele photo range.
When using optical zoom, some digital cameras will have a smooth zoom, meaning you can stop at any point along the entire length of the zoom for a partial zoom. Some digital cameras will use distinctive stops along the length of the zoom, usually limiting you to between four and seven partial zoom positions.