Stacked Lens Magnification

Focal Length Primary Lens in mm
mm
Focal Length Reversed Lens in mm
mm

When stacking lenses, the magnification is determined by the ratio of the focal lengths of the primary and reversed lenses. The equivalent magnification of the stacked lens configuration is give by

[math]\large
Magnification = \frac{Focal\,Length_{PrimaryLens}}{Focal\,Length_{ReversedLens}}
[/math]