2019-04-15 M42 MOUNT SPIRAL: Kamerabau-Anstalt-Vaduz Kilfitt-Makro-Kilar E(APO) 4cm F2.8 (M42) Rev.2 改訂版 https://spiral-m42.blogspot.com/2011/08/kamerabau-anstalt-vaduz-kilfitt-makro.html