Film Holders and Accessories
Roll film holders
Medium-format roll film holders of many different manufacturers can be used with 4x5" cameras. Usually for 6x7, 6x9 and 6x12 formats. The one on pictures is a Wista 6x9 roll film holder.
Cut film holders
Remember that there is no such thing as too many cut film holders.
Polaroid backs are just great. Polaroid is a unique medium, great to work with.
Lensbags, made of soft cloth, are great to keep your lenses and lensboards safe when carrying a lot of equipment inside the camera case.
They are quite inexpensive and the best is to have one for each lens, leaving it attached on the lens. A angle shutter release is a must for wide angle lenses on recessed lensboards.
A fully mechanical self-timer is useful sometimes.