Connecting any camera to an Apple II can be annoying, as most cameras come with a DB-9F or Mini-DIN-8 cable (PC or Mac flavours), and the 8-bits Apple II line uses either DIN-5 or DB-25 connectors.

Building your own adapter is rather easy and all are documented at https://www.colino.net/wordpress/quicktake-for-apple-ii/#cabling-instructions

Otherwise I have hardware solutions on my web shop at https://www.colino.net/wordpress/product-category/apple-ii-hardware/serial/