Preorders:
Olympus E-M5III at BHphoto, Amazon, GetOlympus, Adorama. In Eu at WexUK.
Olympus ECG-5 External Grip at BHphoto, Amazon, Adorama.
No Olympus E-PL10 preorders yet!
Previews:
Image samples and hands-on at Explora. E-M5III preview at Dpreview. E-M5III in the desert at Dpreview. E-MIII image samples at Dpreview. E-M5 II vs E-M5 III by MirrorlessComparison. Olympus OMD EM5 III review so far at CameraLabs. First Impression: Olympus OM-D E-M5 Mark III at Thephoblographer. primeras impresiones at Photolari. Image samples at Photographyblog. Hands-on images at Photographyblog. Preview at ePhotozine. Olympus OM-D E-M5 Mark III Vs Olympus OM-D E-M5 Mark II Comparison at ePhotozine.
Press text:
E-M5III press text on 43rumors. E-PL10 press text on 43rumors.
Videos:
Official introduction videos: