I have 2 Minolta meters. Luckily they read the same. I adjusted or have the shop adjusted my camera's meters so they read the same as my meters. So right or wrong I know what I am getting. I use them quite often but I do use the sunny 16 when I use a camera like the Minolta SRT-101 which requires mercury cell and even with Wein cell it's not accurate. Also I rather use the sunny 16 than using my old Weston Master II. I have the Weston just for fun I never use it.