Quote Originally Posted by DeanC
The lens spec chart at http://www.largeformatphotography.info/lenseslist.html says the 300 f/9 only covers 325mm. Is it like the G-Clarons in that its specs are under rated and it covers more as you stop down?
The circle of illumination of the 300mm f/9 Nikkor-M is large enough for 7X17. However, performance is not real crisp on the corners. The 300mm f/9 G-Claron is a much better lens for 7X17 and 8X20 in my opinion.

Sandy