These pads are sold in sets of 3 "one for each tripod leg" and fits under most tripod feet and works on any surface; dampens out tripod vibrations from the wind or from touching the scope
These pads are designed to reduce vibration time by almost 100 percent and decrease vibration amplitude when placed under each of your tripod legs, prevents dirty tripod feet
Makes observing possible when located near to roads; stops the tripod's feet sinking into softer surfaces
More aperture provide good image with high contrast; ED glass means visible colour aberrations are reduced to minimum with sharp image; all lens surfaces have been provided with multi coated to reduce reflections
For astrophotography; sometimes more focal length is required in order to be seen at a reasonable size in the image especially for compact objects; there is also no shadowing apparent on small image format camera chips for big plus