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Author Topic: Image quality loss with Isco converter? Rob J. Buskop Expert Film Handler Posts: 111 From: Rotterdam, the Netherlands Registered: Aug 2005 posted 10-22-2012 01:15 PM                     It's in the planning to extend my private screening room about 2,5 feet. Problem is, two years ago I acquired two new Schneider Premiere base optics for my CScope format. Their f is 80mm. My new requirement would be somewhere between 86 and 90mm. This could be achieved with Isco's fixed converter of 1.09x The question is: Do any of you know of any detoriation in picture quality when using these converters? Would this be an advisable step? I would be grateful to learn about your experiences in this area. Thanks for your attention!  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 10-22-2012 06:31 PM                     Rob, with so many places converting to digital (and with 90mm being a pretty common focal length) why waste time and money on a converter? It would be pretty easy (and a lot cheaper) to get a good used 90mm lens (Put up a Wanted post in the Equipment wanted forum for example.) Yes, you will lose some image quality with a converter. (Usually focus uniformity but sometimes also contrast.) So, IMHO , forget the converter and just get a 90mm lens.  |  IP: Logged

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