Reducing piece M48a / T-2i # 2958553
with an optical length of 0,7mm to mount the M48-ring directly to the MPCC. That's good enough, as the distance should be 55+/-1mm, and that close to the MPCC, vignetting is no problem, as the lens is smaller, anyway.
But please take a look at the Nikon bayonet or the adapter: The clear aperture of Nikon F-mount is relatively small, so that vignetting might be caused by the T-ring or camera body.
If you think you might need to increase the deistance slightly, there is also our set of M48 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - Aluminium
Manufacturer Baader Planetarium SKU (#) 2458405 EAN Code 4047825029331 Net weight (kg) 0.01 Optical length (mm) 2 Inner Diameter / Clear Aperture (mm) 47 Outer Diameter 54 Outer Connection (lens sided) Dovetail ring, S52 Inner Connection (eyepiece/-camera-sided) Thread, M48 Adaptable to MPCC III / Protective EOS T-Ring Compatible Brands Baader Planetarium Type of Adapter Extension, Reducing piece
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