
How to calculate macro magnification? Some photographers add on close-up filters , extension tube or teleconverter to maximize the macro magnification and wonder what magnification ratio they are shooting at. It is very simple, you only need a ruler.
Life Size (1:1)
It's all depend on your camera's sensor size, please refer to your camera specification to check the sensor size, or you can check your specification on www.dpreview.com .
For example, an APS-C DSLR, Canon EOS 60D's sensor size is 22.3mm x 14.9mm (from dpreview). A 22.3mm long subject fully fills up the width of the 22.3mm sensor,...