The present invention refers to a drape assembly for use with surgical microscopes having an objective lens barrel,wherein, the drape assembly comprises a sheet-form material having a holefurther comprisinga view portal located at the holewherein the view portal includes a frame and an outer surface engageable with an inner peripheral wall of the objective lens barrel for mounting the frame on the barrelwherein the frame includes a windowwherein the frame is attached to the sheet-form material of the drape assembly about the hole of the enclosure to form a sealed connection between the two.
