Yes – 1:1 means life size. That is;
- At 1:1 a 5mm long insect will be recorded as a 5mm long “image” on your sensor.
- At 2:1, a 5mm long insect will be recorded as a 10mm long “image” on your sensor.
This is provided that you are at the minimum or closest focusing distance of the macro lens.
Cheers
Dennis