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Basic "eyepiece projection" method with me simply holding up an Apple iPhone 8 to a Celestron 11-inch SCT with a Televue 41mm Panoptic eyepiece.
(none - other than some cropping and adding labels)
Taken exactly 12 hours after First Quarter. As you can see, the famous "Lunar X" stands out quite prominently. (I was in the "right place" at "the right time").