This paper describes the method of equivalent lens systems and by this method analyses the properties and functions of one-lens coherent optical systems.

本文介绍一种等效透镜系统的方法，并采用这种方法分析单透镜相干处理系统的特性和作用。

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The EP-1 should be available in white and black when it launches soon in Japan, with prices set at the equivalent of $917 for the body only or bundled with a lens for $1,222 to $1,324.

EP-1机型将有黑白两色外观可供选择，马上就要在日本开始发售。 裸机售价将在917美元左右，带镜头售价则在1222-1324美元间。

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Lens reflections, in any case, are equivalent in size to the bright objects, or are smaller than the object.

镜头内的反光在任何情况下都只会等于或小于亮物的大小。

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The DP2 Merrill has a 30mm F2.8 lens, which is the equivalent to a 45mm lens on a 35mm SLR camera.

ENGADGET: Sigma finally announces price and availability for DP1 Merrill compact

The Sigma DP1 Merrill boasts an exclusively designed, high-performance, telecentric 19mm F2.8 lens, which is the equivalent to a 28mm lens on a 35mm SLR camera.

ENGADGET: Sigma finally announces price and availability for DP1 Merrill compact

With three glass lens elements in three groups, it can be used as a wide-angle lens equivalent with a single focal length of 30mm (35mm camera equivalent).

ENGADGET: Olympus E-PL5 and E-PM2: Micro Four Thirds cameras with OM-D-like focusing, performance boosts (hands-on)