According to published specs, the Fujinon C 300/8.5 lens has a larger image circle than the Nikkor M 300/9 (380 vs. 325 mm, respectively). For the 450 mm versions of these lenses, the Fujinon has a larger published image circle, but forum users have stated that the Nikkor version actually has the larger image circle. For the 300mm lenses, is the Nikkor M's image circle actually larger than the published specs, and, if so, is it larger than the Fujinon C's? Thanks!