DSS1 image of the central part of the Carina nebula, of size 26′ × 26′, corresponding to 17.4 pc per side at the Nebula distance of 2.3 kpc. North is up and east is to the left. Red circles indicate positions of sky fibers, using Giraffe setup HR15N. Orange circles indicate fibers on faint stars, using HR15N. Blue circles are sky fibers, using setup HR14A. Light green circles are UVES sky fibers. Big dark green circles indicate the approximate positions of clusters studied here and the Keyhole nebula. The dark green arrow indicates the star η Car.