Of course, one has to recall that the Swarovski's field is so narrow that critical areas of the field were excluded from the very beginning, and it is likely that the optical design did not require anything more than ordinary 3-lens-element reverse Kellner oculars.

當(dāng)然日韩不卡一级毛片免费，聯(lián)想起Swarovski的視場是如此的狹窄一本久道在线无码，視場的臨界面積從一開始就被排除掉了中文成人精品字幕在线视频观看免费，并且看起來它的設(shè)計只需要3片普通鏡片的 Kellner目鏡。

Military glasses have got a reticle inside one of their oculars, and this glass plate usually serves as an extra source of reflections.

軍用鏡子在一只目鏡內(nèi)有刻度板裸模AT国产精品视频，這塊玻璃板經(jīng)常是產(chǎn)生倒影的另外源泉老师在办公室被躁在线直播。

Both are delivered with a nice leather case, leather rain-guard for the oculars, yellow filters and instruction manual in Chinese language.

整個包裝包括一個精致的牛皮盒、牛皮目鏡蓋外国A级免费毛片、黃色濾光鏡以及中文說明和使用手冊男人天堂网址在线。

Additionally, the Nikon SE is not waterproof, and the Fujinon has got uncomfortable, individually focusing oculars.

相比較而言，蔡斯99精品黄色一级电影、萊卡和施華的頂級屋脊鏡幾乎配置了所有的東西：緊湊而輕量的鏡體高清一级做a爱过程免费、中調(diào)防水等。

As can be verified on this list , the first of the 50 mm models, the 7x50, appeared in 1956, followed by the 8x50 and 10x50 in 1957 (the 7x50 B/GA is, with few modifications and with individually focused oculars, still in production).

在這個單子上可看到永久免费精品影视网站播放器，第一款50mm鏡子亚洲一区精品无码色，7x50誕生于1956，后面跟著8x50和10x50誕生于1957年（7x50 B/GA影音先锋av综合资源，只有很小的改動欧美黄页在线观看，目鏡獨(dú)立調(diào)焦類型現(xiàn)在仍在生產(chǎn)）。

But wide angle oculars with long focal lengths have large field lenses, which require large prisms to be illuminated to the edges of the field, and this leads to an expensive and bulky instrument.

但寬視野又長焦距的目鏡含有廣角鏡片麻豆视频专区在线，這需要大棱鏡照亮視場邊緣日本熟妇乱人伦A片高清，導(dǎo)致價格昂貴和體積巨大。

Additionally, the Nikon SE is not waterproof, and the Fujinon has got uncomfortable, individually focusing oculars.

它們也沒有什么旋升眼罩或者最近對焦距離2米這樣的特色国产嫖妓合集在线观看。

Since today's trend goes towards low weight and compact binoculars, optical designers have become reluctant to offer wide fields of view which require larger prisms and expensive oculars with additional lens elements but: Check the No.

當(dāng)前的趨勢是低重量更緊湊的鏡子玖玖爱艹婷婷久久，光學(xué)設(shè)計師不愿意提供大視場，這需要需要更大棱鏡和更貴的需要增加鏡片個數(shù)的目鏡（但cao99，核對 collected wisdoms 的第九條）尹人在线视频综合。

Further features include spectacle-friendly oculars, twist-up eye-cups and a central focuser.

更多的特點(diǎn)包括能適合眼鏡的的目鏡，旋升眼罩日本三级精品，中心調(diào)焦。

Finally, oculars with narrow apparent fields of view can be of simpler construction than wide angle binoculars (e.g. 3 lens element reverse Kellner instead of 5 lens element Erfle), are therefore cheaper, provide a better light transmission and are less prone to ghost images, because they contain less air-to-glass surfaces.

最后三级片网站伊人久久，小視場目鏡也可以比廣角望遠(yuǎn)鏡結(jié)構(gòu)上更簡單（如Kellner的3片式代替Erfle的5片式）可以看黄色一级片的网站，也因此更便宜，提供了更好的透光性九九色这里只有精品，因?yàn)闇p少了玻璃表面黑人又粗又大又猛又爽视频网，也減少了產(chǎn)生鬼影可能。