Wash the figs with cold water. Transfer to a larger bowl, cover with plenty of water and let stand for 20 minutes.
Mix the sugar with the water in a larger saucepan and bring to the boil. Stir with a wooden spoon. When the syrup is boiling, turn down the temperature and simmer gently for 10 minutes.
Remove the figs from the water and add to the syrup. Cut half a lemon into slices and add to it. Bring to the boil, then simmer at low temperature for 30 minutes, stirring occasionally. Remove from heat and puree finely with a hand blender.
Then immediately, while still hot, pour into sterilized screw-top jars and close. The amount gave me 5 glasses with 150 ml content.