Back in the spring, I bought a new flatbed scanner. I wanted one that could scan my old negatives and slides as well as whatever scraps of paper I throw on it.
I did some research. Seems that flatbed scanners are terrible for negative scanning. But there was one, the Epson Perfection 4990 Photo, that was borderline-all-right. If I really want good-quality negative scans, I needed to buy a dedicated film scanner, like the Minolta Dimage. But a dedicated film scanner doesn't scan scraps of paper, and I could only buy one.
Today I used the negative holders and scanned some photos of Palmyra, Syria. Results were pretty "eh." I need to figure out how to get rid of dust and use the settings correctly. Maybe that will help.
Next time, I'll try the slide holder.