xin loi cac bac, vietkey cua em bi chap nen em viet ko dau vay.
em xin hoi co bac nao da dung Olympus OM-1 roi. em xem specifications thay 97% coverage, 0.92X magnification viewfinder. ko biet la viewfinder cua no sang hay toi, em chua co co hoi thu
cam on cac bac.