timely thread as yesterday i dropped my FA with my 50 1.8d on it about 4 feet. it fell right on the lens and smashed the filter. the lens got crushed into itself and now will not focus. sucks but at least it is the cheapest lens to replace.
that aside the 1.8d is a very very sharp lens. stop down to 2.8 and mine WAS sharp all over. yes the focus is not as nice as the AI's but it works fine on my fe2 and FA. I am thinking of getting another 1.8d as i could still use it on my F5 and get matrix metering which is important for me with slide film, but would really prefer an AI for my other cameras (which work great on my D700 also).