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原帖由 linanshanxi 于 2009-4-15 21:32 发表
喜欢这种风格的镜子,
光学怎么样?
Mfr: Ross, London, England
Date: circa 1950's?
AFOV: ~66 degrees
TFOV: ~9.4 degrees
Eye Relief: ~12mm
Prisms: high index
The Stepnada is a classic wide angle glass from Ross. It is perhaps the best known Ross commercial model among collectors. It has a short, compact body, much smaller than the more common 7x35's. It almost looks like a miniature Deltarem, though with not so wide a field of view. The focus wheel is very large as is typically found in Ross Porro I binoculars.
I find the Stepnada to have a good wide field image. It is somewhat soft towards the edge, which seems to be mostly due to field curvature. There is minimal light leakage visible. Unfortunately for eyeglass wearers, the eyepieces are recessed about 6-7mm
-------引自 http://fantao.home.att.net/stepnada.htm
Stepnada是螺絲生產的一款古典型廣角鏡,它可能是在眾多收藏者中最廣為人知的ross商業模型(意思是民用商業鏡吧)。它包含一個短小緊湊的鏡身,比一般735規格要小很多,看起來很像是微型的Deltarem(蔡司著名的超廣角840),雖然沒有如此寬的視角。調焦輪就像典型的ross保羅1一樣很大。
我(作者)發現Stepnada會形成一個好的寬敞的成像。 邊緣有一些軟,多半是因為視場彎曲的原因。有輕微可見的漏光。對戴眼鏡者比較不幸,因為出瞳距離只有向內6-7mm。(到底是幾mm?)
[ 本帖最后由 sks56 于 2009-4-15 22:01 编辑 ] |
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