No. I use a filter-draw from TS-Services (15mm thick), I had to machine a few millimeters off the Nikon T-ring and removed the camera window. If you aim for 45mm lens bayonet to chip distance this will give you a little bit of room to just go past focus.
I have attached an image taken through a Ha filter, the conditions weren't the best, but I have previously posted some images taken in better conditions with lens from Pentax 67 55mm at f/4 and with a Nikon 200mm F/2.0.
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