On the basis of thin-lens focal length measurement experiment, the imaging law of refraction-reflection system was further studied.

在薄透镜焦距测定实验的基础上，进一步讨论了折射反射系统成像的规律。

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The lens is also thin, which means it could be incorporated into a standard liquid crystal display, says Bathiche.

这个镜头很薄，这意味着可以装入一个标准的液晶显示器，Bathiche说。

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If you have a subject with long and thin fingers a pose like the one above will allow you to use the thumb or index finger closer to the camera lens.

如果你的模特手指细长，你也可以像上图一样，让拇指或者食指最靠近镜头。

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Both models maintain their slim profiles by incorporating an ultra-thin 4x optical zoom lens with folded optics.

ENGADGET: Panasonic announces Lumix GF2 pricing and availability, plenty of other models too

Despite the 22x zoom lens, the camera was very thin and light -- it should be able to tuck into a pocket just fine.

ENGADGET

So... hyperbole aside, the FX30 is thin and features a 3.6x LEICA DC VARIO-ELMARIT optical zoom lens, 7.2 megapixel CCD, Mega OIS optical image stabilization, Venus Engine III image-processing for shooting at ISO 1250, and a 2.5-inch 207k pixel LCD (the L74 throws down 230k pixels) with "Power LCD" to boost brightness by 40% (at the expense of battery life) when outdoors.

ENGADGET: Panasonic's DMC-FX30 wide-angle 7.2 megapixel shooter: not quite the world's slimmest