Kendrick dewcaps are constructed of black ABS plastic and are all
felt lined for maximum absorbtion of moisture and baffling of stray
light. The cap is attached by wrapping it around your Schmidt
Cassegrain telescope just below the corrector plate ring. The two
outside ends are then attached to each other using the sewn on
velcro. A rubber strip is supplied that must be attached along the
bottom of the dewcap where there is no felt. This provides a friction
fit so that the dewcap stays in place once attached. It also allows
enough room to attach one of our heaters around the corrector plate
ring on the inside of the dewcap.