20/3.5 -- very nice.
38/3.5 -- my favorite pen lens.
250/5 -- small and light for a 500mm effective (on the G1 of course.) preset aperture, rotating lens mount makes vertical/horizontal switch easy. sharp for a 40 year old lens but won't be nearly as sharp and contrasty as a modern tele zoom.
I've used all the Pen lenses except the 25/4, 38 pancake, 42, the 100-200 zoom, and the very rare teles 400mm and higher.
38/3.5 -- my favorite pen lens.
250/5 -- small and light for a 500mm effective (on the G1 of course.) preset aperture, rotating lens mount makes vertical/horizontal switch easy. sharp for a 40 year old lens but won't be nearly as sharp and contrasty as a modern tele zoom.
I've used all the Pen lenses except the 25/4, 38 pancake, 42, the 100-200 zoom, and the very rare teles 400mm and higher.