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I have a Leitz Pradovit P2000 slide projector. It takes a projection lens with a 42.5mm barrel (not a 46mm barrel). I would like to buy a Colorplan CF or FF lens for it (standard 2.5/90). Several are available on the web, but there seems to be many varieties of lenses with description - some are all metal, some metal plus plastic, different colors(?), made in different countries, some with a "P" or "P2" designation (which I understand needs a focusing sleeve for this projector). I need advice on which are compatible and what differences there are in quality, if any, among these variations and which to avoid (e.g., some Colorplans state that they are made in Portugal, some in Germany, etc.) so I can purchase an optimal lens. Second question: The CF lenses are supposedly optimized for "cardboard" mounted slides, but I have heard that they do not do a great job and that FF lens are overall better, even for non-glassed slides. Opinions? Any advice or recommendation for other sources for accurate information about this would be greatly appreciated. Thank you.
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Dear friends: hello everybody as this is my first contribution to the Forum! For a brief while, I have been collecting projection lenses - including but not limited to Leitz lenses. Unfortunately, I have not been able to find much information on the optical design even of the most common lenses such as the Hektor or the Elmaron. Apparently there are not really any web-availabe resources, aren't there? Finally, I dissected a fungus-affected Hektor. So I have a certain idea now of which shapes the included lenses are in this case (see http://www.l-camera-forum.com/leica-wiki.de/index.php/Bild:SCHEMA_H.jpg). But not being an optics expert, this is not much help without further explanation. I'd appreciate any hint - also to printed material. Best regrads, jan
