The Pen F and later are addictive. Have had Olympus half frame, both VF and reflex since the early 70’s. Over the years have picked up M42 and OM lens adapters plus a few T-mount adapters. These are handy but thin on the ground and expensive nowadays. For a modest wide angle the 25mm f4 is slow but so tiny and the 20mm f3.5 is real nice but probably double or more the 25 f4 price. The 100 f3.5 used to be plentiful and not too pricey. The others are real dear so I stick with the ones I have.
Edit; Except the 50-90 f3.5 zoom. Usually quite cheap. On the camera big, heavy, constant f3.5 aperture, and kind of long with a hood. Only use mine when I cannot stand where I want to be or when the 38mm is too short and the 100mm is too long.