请高人们赐教！

红星之旅

有没有知道或者能够提供德国Busch望远镜历史和相关资料的？
此公司的镜子地位如何？
感谢！

GRAYKNIGHT

BUSCH
   Friedrich Emil Busch, born 06 August 1820.  1840, at work in
grandfather's optical firm - possibly the oldest in Germany, in Rathenow.  
1845, in charge of company.  1846, use of steam engines for lens grinding
machines.  1852, building cameras.  1865, Porro prism monocular and / or
binocular.  1872, becomes public AG company.  Built Krimstecher, Galilean
field glasses for the Crimean War.
   Built a short focus prismatic telescope, with a huge prism at the rear,
reflecting back to a secondary prism near the lens, back through a  hole
bored through the primary prism, to the eyepiece.  (Gleichen)
   1930s, developed the standard 10 x 80, 45 degree offset, binocular used
through WWII, made by many manufacturers, Busch (coded  cxn) seem to have
made the greatest number.
   In business today as Busch AG Optische Industries, Rathenow, Germany.  
Military contracts, including camera lenses and enlargers.
Sources:
Hans Seeger. Fernglaser im Wandel der Zeit.
Alexander Gleichen. The Theory of Modern Optical Instruments.
Text from on line by Christof Plicht and Robert Ariail.
References provided by Plicht:
Martin, K.  Die Entstehung des Pantoscops von E. B.  Photogr.Korrespondenz,
1903.
Martin, K. Ueber den Anteil E. B.s an der opt. Glasindustrie in:
Deutschland.  Dt. Opt. Wochenschrift, 1907.
Von Rohr, Moritz.  Btrr. z. Geschichte des optischen Glases.  Zeitschrift f.
Instrumentenkunde, 1909.
Weiss, E.  Zur Geschichte der Rathenower opt. Industrie.  Dt.
Opt.Wochenschrift, 1917.
Albrecht, K.  Der aelteste Busch-Prismenfeldstecher', in: Dt.
Opt.Wochenschrift, 1917.
Albrecht, K.  Die Geschichte der E.B.-AG Optische Industrie Rathenow 1800-
25.  Opt. Buecherei III, 1925.

改天翻译，先看个大概吧

红星之旅

感谢！
再求。