According to recent rumors, Panasonic is expected to announce a new LUMIX 40mm f/2.0 S lens on April 21. This announcement is also expected to include a new LUMIX S9 special edition camera body.
The new 40mm f/2.0 is described as a very compact lens, reportedly similar in size to (or possibly even smaller than) the TTArtisan 40mm f/2.0. This makes it a promising option for photographers looking for a lightweight, everyday walkaround lens.
If released as rumored, this lens would pair very well with the portable LUMIX S9, creating a discreet and portable full-frame setup ideal for street photography and daily carry.