Maybe add image filters which can be placed in the GUI of the camera similar to how banner patterns are placed in the loom.
Here are some ideas for basic filters
Black & White (Default): There doesn't need to be an actual item for a filter as this would be the default.
Color: 1 glass pane + 1 blue dye + 1 red dye + 1 green dye
Grayscale: 1 glass pane + 1 black dye + 1 gray dye + 1 light grey dye + 1 white dye
Sepia (The image in the OP is a better representation): 1 glass pane + 1 gold ingot
Washout: 1 glass pane + 1 water bucket
Grayscale, Color, and Sepia are the most important. The other two would hardly be used (b&w could be good for horror maps) but would still be interesting.
Paper shouldn't automatically be taken out of your inventory. Just like any other tile entity, you should have to put the paper in manually.