Adapter on OM-D with Nikon lenses question
Your D300 sensor has a 1.5x crop factor, so for example a 100mm lens on your D300 will have the same field of view as a 150mm lens would have on an FX body.
4/3 (and m4/3) sensors have a 2x crop factor, so a 100mm lens on a 4/3 or m4/3 body will have the same field of view as a 200mm lens would have on an FX body.
Hope that helps.
|Fangorn Forest by cand1d|
|Yosemite Falls with Moonbow by Jonathan Shapiro|
from Best Landscape of the Week 4