Fujifilm previously announced six lenses for the GF lens lineup last year. Three of these GF lenses from the original six were released together with the GFX 50S earlier this year.
Fuji is now promising new additions to this roadmap in the form of a telephoto prime lens and tele converter. These are due to launch at the beginning of 2018, according to the roadmap.
By this time, the GF lens lineup will have expanded to a total of eight lenses.
The GF43mm f/2.8 is scheduled to be launched later this year.