I just watched about 30min of youtube on this adapter, thanks for that ;-). I dont think this adapter will work for the RX100 series as it appears to clip INSIDE the filter ring of a "regular" lens UNLESS you get the below adapter. The below adapter basically glues onto the front of your RX100 to add on a filter thread so the Daynox can clip onto something.

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https://www.amazon.com/Kiwifotos-Cyber-shot-DSC-RX100-RX100III-Threaded/dp/B07BGS6ZBJ/ref=pd_sbs_421_t_1/136-6493209-3320133?_encoding=UTF8&pd_rd_i=B07BGS6ZBJ&pd_rd_r=98ad8b3d-5371-4791-8d55-2497e6ea9e25&pd_rd_w=tBju5&pd_rd_wg=IcOKX&pf_rd_p=5cfcfe89-300f-47d2-b1ad-a4e27203a02a&pf_rd_r=54BWE26QMW9AM21EC39C&psc=1&refRID=54BWE26QMW9AM21EC39C