The Zaan ferry takes you in half an hour from Amsterdam Central Station to the Photo Museum on the Hembrugterrein. Here you'll find the schedule. With this combi-ticket you can hop-on the boat again to visit the Zaanse Schans. This is a single fare ticket.
Please note: There's no boat on Wednesday. From Thursday to Sunday the last boat from Zaanse Schans back to Amsterdam CS is leaving at 3PM on Saturday & Sunday, on Thursday and Friday at 1PM. On Thursday & Friday the Zaanveer uses different times than on Saturday & Sundays. With this ticket you can also hop on at Zaandam Zaantheater (only a few minutes walk from Zaandam CS).