Could it not be a large format taking lens in barrel, i.e. no shutter?
Earl
rainer@xxxxxxxxxxxxxxxxxxxxx wrote:
>Hi zuikists,
>I think this strange item can only be a projection lens for an
>episcope (used to project non-translucent big pictures or book pages
>with reflected light). It cannot be a condenser, the focal length is
>much too long for this application.Condensors normally do not show
>information about brand or data. I own some of these beasts, not
>Beseler but Leitz (325mm/f3.6, 400/4.0, 700/4,8) Some days ago there
>was a 800/4.8 on german *bay. Typical application was projection in big
>lecture halls. I think the longest had 1m focal length...
>By the way, image circle is huge..I was tempted to use one for building
>a simple large format camera. Instead I now use it mainly as a "rich
>field scope" in astronomy.
>Nice thing!
>
>Rainer
>
>
>
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