Found some handy NPD calculations here on Optiboard. (drk's 95% sure is alluring!)
But let's say I'm using:
NPD=DPD -(DPD/[1+W{1/s-F/1000}])
When calculating for power "F", do I use the 180 axis as the reference for factoring in cylinder power? This seems intuitively correct to me, but since reading segments are dropped below eye level to some degree, I feel inclined to try and outsmart myself.
Thanks for the assist.
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