image courtesy of Daniel J. Cox
Natural Exposures has a comparison between Leica/Fuji/Nikon super zooms and the Olympus 300mm. In my opinion the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR, that I reviewed earlier this year, is the clear winner even through Daniel J. Cox isn’t familiar with Fujifilm cameras/lenses. The XF100-400 and Fujifilm X-T1 work great together and I would highly recommend the combo to anyone shooting wildlife.