Position your non dominant hand on the table. Fold and bend your fingers to create foreshortening.
Lay the viewfinder over your hand. This is difficult. You will need to balance the viewfinder carefully.
Using the marker, trace exactly what you see. Draw only the parts of the finger that you see. Include folds, wrinkles and lines.
Go SLOWLY! Erase marks if you need to.
Waterbased Marker NOT PERMANENT MARKER