At least one reader has received his ZM 35/1.4 Distagon from B&H Photo.
I consider the Zeiss ZM 35mm f/1.4 Distagon for Leica M the finest lens available for the Leica M240 or other M camera. That is partly a statement on its optical performance (it bests every Leica M f/1.4 lens at f/1.4), but also a total metric including sharpness, bokeh, build quality and operational characteristics such as 1/3 stop aperture clicks of superior haptics to any M lens, a size that is perfect for my hands, excellent focus feel and throw.
The Zeiss ZM 35/1.4 Distagon can also be used on Sony mirrorless with adapter, though with some loss of performance due to ray angle caused by the sensor cover glass, as shown in the MTF table for the entire range of apertures; see MTF on Mirrorless Cameras in Guide to Leica, which compares the MTF on Leica M vs mirrorless at f/1.4, 2, 2.8, 4, 5.6, 8.
Lens shade and filters
The lens shade 2112-813 for Zeiss ZM 35mm f/1.4 Distagon is sold separately (as with all Zeiss ZM lenses, see lens shade for Zeiss ZM).
My recommendation is to get the lens shade if for no other reason than protection; it’s not so much for flare, but for protecting the front element in extended field use (true of most all compact Zeiss ZM and Leica M lenses).
Or at least use a filter, because the front element can be scratched in field use (I’m guilty there, though the fine scratch I made did not affect image quality that I could see). The Zeiss 49mm Carl Zeiss T* UV Filter and Zeiss 49mm Carl Zeiss T* Circular Polarizer Filter are my recommended choices there.