Sorry guys, but it's probably not a glass prism

Started Sep 5, 2007 | Discussions thread
Cliff WYS Forum Member • Posts: 54
Re: Sorry David, but it IS definately a glass prism!!

There is mention of low dispersion glass in second sentence.

http://www.sony.jp/products/Consumer/dslr/products/body/DSLR-A700/feat03.html
Halfway down the page.

クリアで明るいファインダーを実現するため、光学ガラスペンタプリズムを搭載。接眼光学系を高屈折率低分散ガラスで構成し、ARコーティングを施すことでファインダー内のゴーストも低減。収差を抑えた大きく見やすいファインダーを実現しています。フォーカシングスクリーンには、ピントの山がつかみやすいスフェリカルアキュートマットを採用し、MF時も快適なピント合わせができます。

Crude babel fish translation:

Because the bright finder is actualized with clearing, loading the optical glass pentaprism. High refractive index it forms ocular optical system low with the dispersed glass, it decreases also the ghost inside the finder by the fact that AR coating is administered. The largely easy to see finder where aberration was held down is actualized. The mountain of focus adopts the clamp easy スフェリカルアキュートマット to the focusing screen, at the time of MF the comfortable focus adjusting is possible.

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Cliff

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