Assertion: newtonian telescope's mirror | /r/CapableOf | perform the performance
Facets:
value: optimally
type: MANNER
Source sentences:
text: These mirrors are then undercorrected when specific observing conditions are experienced, and will only perform optimally when cooling conditions exactly match the amount of undercorrection that is figured in, which will be quite a rare occurrence, and at that time the cooling itself will degrade the performance anyway.