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81/4 inch f4.5 Xerox lens mande in England by Rank Taylor Hobson
Would any one know anything about this lens. Is it a portrait lens or as I
suppose a copy machine lens? I find some of the info I can glean somewhat sketchy. |
#2
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81/4 inch f4.5 Xerox lens mande in England by Rank Taylor Hobson
"otzi" wrote in message u... Would any one know anything about this lens. Is it a portrait lens or as I suppose a copy machine lens? I find some of the info I can glean somewhat sketchy. If it says Xerox on it its obviously a copy machine lens. These are typically Plasmat types optimised for unity magnification. Also, they typically have a limited range of f/stops although you can sometimes remove the mechanical stops in the iris mechanism. The color correction depends on the kind of copy machine it was intended for. Some older Xerox machines used blue or green light and the lens may be optimized for it. Newer machines are panchromatic or color and the lenses must be well color corrected. The performance of these lenses at infinity may be pretty good if they are not used wide open. Taylor-Hobson is a known for manufacturing very high quality lenses. About all I can say is to try the thing and see what it does. -- --- Richard Knoppow Los Angeles, CA, USA |
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