METALLICITIES IN THE MAGELLANIC CLOUDS FROM CCD STROMGREN PHOTOMETRY - THE GLOBULAR-CLUSTERS NGC-1866 (LMC) AND NGC-330 (SMC)

We present Stromgren CCD photometry for the globular clusters NGC 1866 and NGC 330 in the LMC/SMC and for their neighbouring field populatio n. The metallicities, which result from the Stromgren data for NGC 186 6 and NGC 330 are - 0.43 +/- 0.18 dex and -0.93 +/- 0.16 dex, respecti vely. The metallicity of NGC 1866 could be lower by 0.2 dex, if NGC 33 0 has an abundance of -1.1 dex, as it is indicated by spectroscopic st udies. This is the first direct determination of the metallicity of NG C 1866, a key object in stellar evolution theory. Additionally, we det ermine metallicities of (older) field stars in the cluster region and use them to estimate ages for a number of individual red giants by com parison with theoretical isochrones. For a number of reasons, these re sults are preliminary. However, several interesting features appear wh ich are worth to be studied with improved accuracy: in the field of NG C 330, no clear age-metallicity relation can be seen. Some field stars seem to be older than NGC 121, the oldest SMC globular cluster. In th e field of 1866, there are some stars falling in the age range between 3 and 10 Gyr, where star clusters are lacking. A very small age-metal licity relation appears, but the existence of stars with metallicities lower than -1.5 dex is not certain even among the oldest stars.