Adam, From your OP it sounds like you've already purchased the 115mm Grandagon N. I also standardized (initially) on 67mm filters for my MF and LF kit, but then had to add 82mm filters to use with certain other lenses that found their way into my kit. However, did you ever consider the 110mm Super-Symmar XL instead of the 115mm? The SSXL uses 67mm filters, and is an outstanding lens overall - 'just saying.
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