jlstan wrote in post #17519106
The 100L is the one I keep going back to. I was kind of hoping someone would talk me out of it

I am wanting to use it in the woods for shooting closeups of fungus and other things of nature along with insects and the occasional production shots
Heya,
Then get a flash, regardless of the lens. Fungus doesn't grow in the bright sun. It's always in dark, damp places. Places where natural light is scarce. And all the IS in the world, will not help, at macro-range for a dark shot. Super high ISO to make up for it will take away from the detail of such small bits. F2.8 won't be enough, not even close. And you won't have enough DOF to see much of the fungus at F2.8 and close distnace.
So, get a flash and mix ambient & diffused flash light.
Any macro lens will do fine.
Very best,