The dual stabilising and focussing are amazing. I can hand hold this lens on and off for hours with perfect steadiness. Add to this a silent electronic shutter and instant AF and the shooting process is a series of instant, silent, considered grabs, more like sniping than machine gun hammering.
My usual camera AF setting for sports is a stack of three boxes on one of five spaced vertical rows (linked to both orientations), which allows me to be single person precise, centred, off-centre or hard left/right at the flick of a thumb nubbin. I also have three horizontals, some clumps and the usual suspects, but the three stack is the most used. Sometimes I actually forget the thing is focussing. It just seems to be seamlessly “in” all the time.
Where my skill comes in is hitting the right point, so when I miss is the only time I see anything wrong (although something is always in focus). In the games pictured, I would expect at least a 90% hit ratio, with the misses down to me. As I have stated before, I shoot single shot, sometimes in sequence, but shot by shot by considered shot.
It is small enough to fit into a “normal” camera bag, takes normal filters and goes largely un-noticed*. It will go into my F802/804 Domke bags with a camera mounted or the little (often too little) Pro Tactic 350 with the 40-150, 1.4 tc, 75, 8-18, 12-40 and 2 pro bodies. That is pro grade 16-840mm coverage with depth in a bag that I often complain holds too little.
Weather sealing is top flight, an Olympus speciality. Use it in salt spray and wipe down with fresh water. All good.
The magical F4. No matter how much other factors improve, a brighter lens will always have an edge which is why they still sell $10,000+ full frame models. The fact that it is identical in performance at all apertures does not hurt.
Handling is ideal. I can carry it all day on a cross-body strap, never needing a monopod. I can change angle, run, lie down, use a second camera and lens with it, which all contribute to a lens you want to use, rather than one you need to use. This is particularly handy for group huddle shots at half time. I can jog between both teams and grab a series of head shots in a quarter time break.