In a slightly more sensible vein than the last post.
About 50% of my images. Checking with LR I find that the 300 with the converters is by far my most used lens.
But I do wild life so its not much of a surprise. A bit of motor sport. Even the odd still life. And the occasional Macro.
All in all its a pretty special lens, for me anyway.
I didn't try a macro yet with that lens. Did you use an extension tube or extender for the second and third photo? I presume that those are made on tripod
both those shots were hand held with a 2x extender. The flower was processed to have grain, originally it was very smooth.
it's very easy to hand hold and compact for the 600 mm length. I often use it with a tripod, but that's mainly for ease of use as the IS is very effective.