8 Sigma 150-600 at 600 mm + tc1.4 ext + Kenko 1.4 ext.
Just for the fun. To play a bit.
AF only possible with Live View at F13.
It's working slow, but still working,
600mm x1.4x1.4=1176 mm, Exif says 1200 mm.
Camera combo on a firm tripod (Sirui N-3204X).
Picture taken with mirror lock-up and remote control.
All to prevent shake and take a sharp as possible picture.
I didn't spend energy in Fine tuning, I only play with this setting.
But for stationary objects, it could be useable.
Its sharpness is quite good to make nice pics