>>4464972
As for RF 100, well, here's a pic with it.
The subject is much smaller than a bumblebee, or even a drone fly, so I probably wouldn't be able to take it with either 55-250 or 150-600, but the shot itself is rather mediocre.
And it took (comparatively) a lot of effort to make.
Had to get really close to the subject, to the point when a slight sudden movement from me could cause the plant to shake and little dude to fall off the leaf.