ZUIKO Om 200mm f4 with raynox?
Please read this carefully and your will eventually be able to calculate the magnification of your system.
(Thanks to the original poster; Riccardo Polini)
One thing you have to know is the strength of RAYNOX DCR250 (diopter value) which, in my opinion, you can search from RAYNOX website.
|Orange-tip Butterfly by anisah|
from Nature's Colour Palette
|Windswept juniper by Kreber|
from Wind power