You’ll only need to consider a different prime lens if you require a prime with a shorter or longer focal length. If the Panasonic 15mm f/1.7 Leica Summilux DG ASPH isn't for you The fast prime ...
Panasonic Leica DG Elmarit 200mm f/2.8 POWER ... is that it essentially provides two focal lengths with a single prime lens, which undoubtedly adds value and versatility. One point to note here ...