Is anyone successful in the spacing using the baader mk3 cc using the m48 fitting to a T-ring using a f5 200pds so at the minute I have a Tring and 4mm spacer on the cc giving me 13mm the Nikon sensor distance is 46.5 giving me 59.5 baader give a distance of 57.5 using m48 , so if your using the cc on a Nikon successfully what is your measurement I’m assuming I need a 2mm spacer instead of 4mm  .

regards Dave