I recommend you check out the prism finder,before you buy the porofinder( which is as dull as dishwater ) it's heavier but gives a much brighter screen image, it has no meter, but a decent quality Gossen Lunasix( I think they are called Lunapro in the U.S.A ) second hand would be a good buy, and exposure for closeups are easy to calculate on it to allow for the bellows extension.