9-seconds .... wow - the only way I could contemplate anything like that would be if I were propped against a pole or tree - and even then it would not be guaranteed for success
Sorry lost this thread. The phone app I used is called Spectre (IOS not sure if it is Android). Basically you decide on the length of the exposure then hold the camera so the little box stays inside the larger box while the exposure is happening then the software does its magic.
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