A couple of questions about lenses and finders for the 6000 system:
1) I note that the 150 Sonar PQ seems to be discontiued. The 150 Sonnar PQS and EL remain. When was the PQ version discontinued? Is there any optical difference between the PQ, PQS and EL versions of this lens?
2) I'm looking for a 90º finder and have seen cooments that the curent 90º finder uses a lens and mirror system and is not as bright as a prism finder. Any experience with this finder? Also, I see used 90º prism finders and also see there is one offered for the HY6. Anybody have experience with the older 90 prism finder?