Optical Interface Study of MANIFEST to GMACS and G-CLEF Instruments

MANIFEST, the Many Instrument Fiber System, is a fiber-positioner facility proposed for Giant Magellen Telescope (GMT) by Australian Astronomical Optics, Macquarie University (AAO_MQ). It will use hundreds fiber robotic positioners "Starbugs" to access telescope large focal plane and provides a means for the first light instruments GMACS and G-CLEF to increase their native capabilities. Since the concept was proposed, a lot of development has been made. In this paper, we will report the latest optical interface development between MANIFEST to GMACS and G-CLEF instrument during the pre-conceptual design study.