Abstract: A damper for isolation of vibration includes: three ball bearings; a bearing support member having a sloping top side portion adapted to gently maintain the three ball bearings in spaced position when rollingly carried thereon; and, an equipment support member having a sloping bottom side portion seated on, and carried by a top side portion of the three ball bearings. When vibration moves the roller support member, the ball bearings roll and the equipment support member carried thereon remains relatively stable. The damper may be carried on a suspended carriage having: an upright tube having an open top portion and three spaced openings therearound; bolts positioned above the spaced openings; an inner suspended member having three outwardly projecting legs positioned to project through the openings in the upright tube; and, three bands each interconnecting the bolts and the projecting legs thereby suspending the carriage within the tube.

Abstract: A secondary focuser which facilitates minute and measured incremental changes of the focal length within a limited travel distance is disclosed. The secondary focuser is used to micro focus telescopes for astro photography. A method of constructing the micro focuser comprises the following steps: constructing a housing having an open central axis therethrough; slidably disposing a travelling inner sleeve within the housing; and, mounting and arranging a micrometer head on the housing. When the micrometer head is turned the inner sleeve travels within the housing finely adjusting an axial length therethrough. In a preferred aspect of the invention the micrometer head is configured to turn about an axis generally perpendicular to the central axis through the housing, pivoting a rocker arm so that when one end portion of the rocker arm is moved in a radial direction, the other end moves in a direction generally parallel to the central axis, thereby longitudinally shifting the travelling sleeve.