I just got an OM-1 and of course started reading about all the focusing screen options and am trying to figure out which one I already have. I have been referring to this site: http://www.mir.com.my/rb/photograph...mpusom1n2/shared/accessory/screens/index1.htm The viewfinder image I see is the brightest and largest I have ever seen in a camera which is good, but I am wondering about the fact that some of the focusing screens are noted as "The meter needle does not indicate proper exposures" If I had to take a guess, the image I see in the viewfinder looks most like what I see listed as a 1-5 to 1-7 type. I see a small circle in the middle where I achieve focus so that is the microprism type I believe. To me the area outside of the microprism circle looks basically clear, not at all what I would call matte. I would assume on the matte focusing screens the area outside the circle is very obviously matte. So my questions are, what are the impacts if I have a 1-5 to 1-7 type, can I not trust the meter at all period? And is there a good way to tell which screen i have already? From what I have read a lot of people like the 1-4 or 1-4n screens. thanks!