Peel, halve and core pears, dropping them into the lemon water as you go, to prevent discoloration. Meanwhile, simmer wine with lemon zest and juice, sugar and cinnamon for 5 minutes.
Drop in the pears (adding only so many that the cooking liquid covers them, or add more wine plus 6 tablespoons sugar per cup). Maintain liquid at just below the simmer for 8 to 10 minutes, just until pears are tender when pierced with a knife.
Let them cool in the syrup for at least 20 minutes. Serve warm or cold; store
in a covered bowl, in the syrup, under refrigeration.