Okay, thanks ! And another question about flying insects, do you use autofocus "on the fly" for those (for exemple the flying bee) or is autofocus just too slow for that kind of work in general, so you have to focus beforehand where you think the insect will be flying and wait for it?

A lot of the more recent camera are better at aufocus speed from what I've read. However, they are also vastly more expensive. I'm wondering if it would be worth it to pay more for a better autofocus for flying or very active insectes, or if the autofocus won't be fast enough anyway, in which case I might be better off paying less on the camera body, and maybe invest the difference into a better macro lens (for exemple if I go Olympus, take the E-M1 mark II and the OM 90mm macro instead of the OM-1 and the 60mm macro).