On the product page for the FW8S-STXL non-guiding "standard" filter wheel I read: "... the covers interchangeable. If you have the Self-Guiding version you can add just the Standard cover if you wish to use the STXL camera lens adapters for Nikon or Canon EOS lenses." On you product pages I find the CLA-X-CN STXL adapter for Canon, but I do not find a corresponding adapter for Nikon. Does this exist?
Yes, we do have a CLA-X-NIKON, but it was missing from the online store. I've updated the site; here's the direct link: http://diffractionlimited.com/product/cla-x-nikon-stxl-nikon-lens-adapter-with-filter-wheel/