What is 1X optical zoom in Digital still camera?

People don't use the term 1x zoom because (if you look at it from a maths point of view) that would mean that the lens can't zoom at all. The 3x, 5x, 12x zoom gives you a rough idea of how big the zoom range is, but it doesn't specify where the zoom starts or stops. For that, you have to look at the zoom range as expressed in 'mm'.

Most digital cameras start at 28mm or 35mm. That's pretty decent for a wide angle shot. If a camera has a 35-105mm lens, you can calculate the zoom range by dividing those two numbers: 105/35 = 3x zoom.

A 28-280mm lens has 280/28 = 10x zoom A 35-280mm lens has only 280/35 = 8x zoom You get the idea. The smaller the first number is, the better it is for wide angle shots. The bigger the second number is, the more you can zoom in on small details.

If the larger number is 200mm or more, you'd normally need a tripod or image stabilization - that's pretty powerful. Then there's a distinction between optical and digital zoom. Optical zoom is achieved by the lens - ... more.

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