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ggll0491 发表于 2017-7-14 18:39
这里不都是在强调是一家之言嘛,不妨听一下。未必就不好。 你相信他说的对? ...
This sale is for a Wollensak 51mm (2.04") F/1.5 Raptar lens, serial number D93951. This lens is a special version made for use in an industrial camera made by EG&G to record traces from a CRT. This particular example was used in the 1960's at the Nevada Test Site to record nuclear events.
A little history: EG&G produced an oscilloscope camera some years ago that used a Nikkor 50mm F1.4 lens from the rangefinder camera series and at some time the Nikkor lenses were no longer available so EG&G began to use this Wollensak lens in their camera. EG&G originally choose the Nikkor because of extensive testing on lenses to find one with maximum sharpness and contrast and choose the Nikon product. This Wollensak lens is equal or better! I actually tested this lens against the Nikkor on my autocollimator and the Wollensak came out ahead on sharpness and contrast at all apertures! Wide open at F1.5 it is sharp and when stopped down to between F4 and F5.6, it reaches maximum sharpness and most aberrations disappear. The lens has an app. 45mm diameter screw thread and f stops from F1.5-F22. This particular example is in perfect working condition, there are a some marks and scratches on the barrel where a ** property tag was scraped off! Glass is clean, diaphragm works smoothly.
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