I've just got an OM Zuiko 65-200 f/4 So by way of trying it out I put it on an E-PL1, set it to f/4 and took two shots, the first at 200mm then another at 65mm. I then put the ED 50-200 SWD on and took two similar shots. Today was a very "grey day" so with only f/4.0 available and the ISO @ 200 the speeds were quite slow (down to 1/125). All was done hand held, on the quick, just to see if the 65-200 was any good at all... What a surprise. Sure there is a difference, one was designed 30 years ago for film the other is very new and simply brilliant, but the shots from the 65-200 are considerably better than expected. What is also remarkable is that I can still hand hold, what is effectivly 400mm at 1/125s and get a usable image. I shall give this another go on a sunny day and use a tripod, etc., and see just how good this old glass really is.