>>3302821Yes, it's the easiest way to target small subjects since the lens tends to eclipse them.
>>3302869Jupiter - with a few of its moons.
Whilst the Moon and Jupiter were taken handheld (the lens has a very effective IS system), I had to take a second image just to expose the tiny Jovian moons.
To be honest, I'm only using it on this lens for the extra 1.61x additional focal length due to the APS-C crop. When I add TWO extenders I get up to 1800mm with it.
Normally (95% of the time) I use a tiny EF-M 22mm f/2 STM lens on this camera and the whole thing fits in the palm of my hand. I like the lowlight performance of my Full Frame DSLR but there are times when APS-C can handle shot just as well or better (if you need the crop).