Scanning 4x5 inch sheet film has always been time consuming with flatbed scanners and very expensive with drum scanning options. The 4x5" Film Holder from Negative Supply is a game changer by offering film photographers an easier way to work that’s straightforward and allows nearly instant results by using a digital camera for capture.
The Sheet Film Holder fits with ease onto the Pro Mount MK1/MK2 and comes with two sheets of ANR glass to put your sheet film in between for scans of the highest quality. Keep in mind that while the micro-etched surface of the acrylic is durable, you should treat it as you would film negatives. Carefully brushing away dust with a microfiber cloth or anti-static brush, but never pressing down into the surface.
Alternatively, you can even use the holder to scan with full borders on single frames of 120, 35mm, and even other uncommon types of film like 110.
A clear guide on how to use the holder can be found here.