In this article, I’ll show you how to create a simple, improvised smartphone film scanner.
Once, I had the desire to scan film, but it was already midnight, so I decided to use an old Soviet enlarger instead. I was surprised by the results.
However, I wanted to improve the results:
- Increase the resolution
- Use a smartphone camera
- Get rid of the vignetting associated with condenser enlargers
- Have fun with color balance.
Later, I made a smartphone film scanner using scrap materials (boxes of old CDs) and LED lights. The design of the device is as follows:
White, green, and blue LEDs are located at the bottom of device. The brightness of each color group can be increased or decreased. LEDs are stuck on the frosted glass, and film is pressed against the glass. On the stand is a smartphone, from which you could see the negative through its camera.
I was able to solve the problem on the blue-tinted photos. Negative film has a red substrate and the positive picture from it is always blue, so if you use the auto white balance function of the camera, the red and green colors will be removed.