Olympus E-M10IV at Adorama, Bhphoto. GetOlympus. Amazon.
100-400mm at Adorama, Bhphoto. GetOlympus.
Presentation at Explora. Initial review at Dpreview. 100-400mm review at ePhotozine. 100-400mm lens comparison with the Panasonic by Mirrorlesscomparison. E-M10III vs E-M10IV by Mirrorlesscomparison. Hands-on by Thephoblographer.
E-M10IV image samples at Dpreview. 100-400mm image samples at Dpreview. Image samples at Imaging Resource.