Thingiverse
MN190 cooling cap
by rkayakr
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A cap for an Sky Watcher MN190 mak-newt. I go out at dusk to open the observatory to let the scope cool to ambient. There are air cooling holes around the lens, but if I remove the scope cover I expose the lens to possible contamination and dew. This cap just covers the lens without touching it and without blocking the cooling holes.
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