A compact and efficient optical system incorporating a long-distance microscope has been designed and developed for enhanced standoff Raman spectroscopy measurements for a lunar payload on an Astrobotic CubeRover. In our optical configuration, the observation geometry, polarization, and excitation wavelength can stay fixed, whereby the differential cross-section for a given Raman spectral band would be adequate for gauging signal strength and optimizing the etendue (product of illuminated area of the mineral sample and the solid angle of scattered light collection). A range of optical fibers (1m, 10m, 30m, and 60m) have been employed in conjunction with a long-distance microscope to record reproducible and good quality standoff Raman spectra of a variety of lunar analog minerals (olivine, limonite, gypsum, calcite, quartz, corundum, etc.) and the lunar simulant regolith sample (JSC-1A).