Yeah, you are right. Except, (and I have to explain myself), Australia is a bit like Auckland. I do not know where that place is.Wayne, if you stacked a 1.4x and a 2x converter on this you would be able to see Australia....no problem!!
How about put a mirror on the moon
I have a R105-280. Seen a ?7.2X Ocular (US$330). So thats about 2000mm. No idea if possible, but with 2X, 1.4X =5600mm. Telescope, not camera. See the moons of Saturn whizzing by...