Mix vanilla wafers and pecans together.
Add melted butter and stir until thoroughly moistened.
Press into bottom of springform pan and bake at 350 degrees for 10 minutes. Cool.
Cream together cream cheese and sugar. While mixer is running, slowly add eggs and continue to mix for another 2 minutes or until smooth.
Add pie filling and lemon extract and mix thoroughly. Pour into cooled crust.
Bake at 350 degrees for 50-55 minutes (Center will not be set until cooled.)
Serve chilled. Garnish as desired.