The earliest appearance I can find of this camera is in 2005. Newegg, a 3rd party dealer, once sold it purportedly with a manual. I do not find that manual on the web. In fact, I do not find Ezonics home page. The last contacts I have found for Ezonics is 48521 Warm Springs Blvd Ste 315, Fremont, California, 94539, United States. Phone Number (925) 960-9278. I have not confirmed this is yet a viable contact nor whether you can get a reply from
[email protected]. This particular camera is not the Amano camera you may encounter information about. You might find a contact or information on the forum of Photo.net. A few comments were offered by buyers at the Newegg site:
https://www.newegg.com/ezonics-opus-4000-ultra-compact/p/N82E16830109122. I suggest being doubious of sites which might claim to have access to the manual after you give them a lot of information. My multiple searches have not turned up the manual at this point. Sorry.