Well I have damaged my big lens (had to go back to Olympus) so I was stuck with my zoom and 2xTC!! I am posting to gauge your opinion on IQ and sharpening. I appreciate the image is a bit of a dog's breakfast from a composition POV.
I think the sharpening isn't bad, in fact you can see the split ends in his whiskers! Any how let me know favourable or otherwise - thanks.
Olympus E-M1MarkIIIFocal Length : 300.0mm
Focal length in 35 mm film : 601.0mm
Exposure mode : Manual exposure
ISO Sensitivity : 1600
Exposure compensation : 0.0 EV
Shutter : 1/100 sec
Aperture : F8
ACR/PSCC