I've got an M3, but my glasses make it hard to see the frame lines all at once. There's an aftermarket eyepiece attachment that claims to turn a .85 finder into .72 and .72 into .58 (link to ad is below). Has anyone used it?
http://cgi.ebay.com/0-85x-Viewfinde...I&otn=4&po=LVI&ps=63&clkid=849830716458068488
http://cgi.ebay.com/0-85x-Viewfinde...I&otn=4&po=LVI&ps=63&clkid=849830716458068488