We have the complete guide for finding Voxophones, Infusion Upgrades and Kinetoscopes (Sightseer collectibles) in the game.
There are 141 collectibles in total and you have to find them in one playthrough to get them all effectively or you can do a chapter select to find them as well.
Here’s the breakdown of the collectibles: 80 Voxophones, 24 Infusion Upgrades, 37 Telescopes and Kinetoscopes. This will also unlock three Achievements in the game.
There are no collectibles in chapter 1, 21, 25, and this guide is divided into 3 pages.