I just acquired a beautiful set of lens clusters for a 14 inch Caltar. I already have a 250mm WF Ektar in an Ilex #5 shutter, the same shutter as needed for the Caltar elements, so I had just planned on swapping the sets of elements as needed since the f stops are the same for both lenses. I had hoped that they would require the same thread diameters as the Ektar, but that's not the case....they need a larger diameter. That leads to the assumption that that I will need spacers, not only for the diameter, but also for the offset distance, but I have not been able to locate any schematics that show the sizes needed for both front and back sets. Can anyone out there in Large Format genius land help with the needed data or better yet, with an actual set of spacers?
I've got a brilliant machinist locally who can create these, but we need the actual measurement data first so we can be sure of getting the precise required distance between the two sets of elements.
Many, many thanks.
Tim
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