LensCoat® سوني FE 400 f2.8 GM OSS

I was a bit worried about adding bulk to an already heavy lens, but the fit is snug and doesn't interfere with any controls. The neoprene material really does a good job protecting against the inevitable scrapes when I'm hiking with it.

The material is thicker than I expected, and it really helps protect against scrapes when I'm moving my setup between locations. Installation took about ten minutes, and it hasn't shifted since I put it on.

Took it out on a rainy weekend shoot and the cover stayed snug the whole time, no slipping even with the lens on a monopod. The cutouts line up perfectly with the focus and function rings, so I didn't lose any handling. Feels like it'll definitely keep the resale value up.