А ещё у меня есть вот такая цапа:
Voigtlаnder’s Collinear 90/5,4
десятикопеечная монетка для масштаба.
Collinear lenses are achromatic, rectilinear and free from distortion. Their speed, especially of the Series II., is of a very high order. The lenses of this series are the most rapid symmetrical anastigmats.
They work with an aperture of f.5.6, and are suitable for focal plane shutter work. The rear combination of a Collinear lens can be used alone as a landscape lens, giving double the focal length of the complete instrument. The general appearance of this lens, also its optical construction, is shown in Illustration:
описалово взято отсюда. Собственно линз у меня уже почти год, просто захотелось похвастаться :) Единственное что огорчает, отсутствие затвора и соответственно невозможность мгновенных выдержек.
The collinear is a 3+3 symmetrical anastigmat lens, very similar to the Steinheil Orthostigmat. According to the Lens Collector’s Vademecum, «Users say that the performance is very good, but that the color correction can be less good than other types, and the faster series may lack ultimate sharpness.» The «other types» mentioned here are certainly the fabled Goertz Dagor, also a 3+3 symmetrical anastigmat. The Collinear was offered by Voigtlander as early as 1895, or 5 years before the release of the Heliar.
I don’t have a Collinear, so I cannot comment on its optical quality. But I have many other symmetrical anastigmat lenses dating from the same period and they are usually good performers if used stopped down to f/11 at least. Like most of the lenses from this period, «fast» apertures (like f/6.3 ) were only used for focusing.
Usually, people consider that the best lens ever released by Voigtlander is the Apo-Lanthar, a 5 element lens released after WWII on some very high-end cameras. The Heliar is the same optical design, but doesn’t contain rare earth special glass like the Apo-Lanthar. I have many Heliar lenses in various focal length and they are always great performers. The soft and mellow rendering of out of focus areas is the trademark of the Heliar.
ну, как бы мнение. цапнуто с www.rangefinderforum.com
то есть линза по схеме похожа на дагоры, что и так видно из предидущей картинки, и предшественник гелара, вокруг которого все сходят с ума )