Film Negative Scanner: Negatives to Photos with Your Phone Camera

Color negative film sits on an orange base — the mask that corrects the dyes when the negative is printed. A plain inversion turns that orange into blue-cyan and leaves the blacks milky. The scanner divides the base out channel by channel in terms of film density and then sets black and white points for each channel, which is what an enlarger and a lab printer do.

That is moiré: the camera sees the screen’s pixels through the film. Raise the film 1–2 cm above the screen, or put a sheet of plain printer paper between them as a diffuser. A window or a lamp behind paper has no pixels and no moiré.

The film was photographed from the emulsion side. The shiny side is the base; the duller side is the emulsion. Press “Mirror” — the frame is flipped without losing quality — or turn the film over for the next shots.

The film base is the unexposed strip along the edge and between frames. Tapping it tells the scanner exactly what zero exposure looks like on this film, so shadows become neutral black even in a frame with no black in it — a sky, a snowy field, a fog. The scanner also reads the base itself when the edge of the film is in the shot.

On Android the scanner takes the shot from the full camera sensor, so it matches the camera app. Where the browser only gives the video stream (iPhone, most laptops), that is about 2 megapixels: for the most detail, photograph the film with the camera app and open those photos here — the conversion is the same.

Yes. Photograph or scan the strip whole and open the file: every frame on it is found, cut out and added to the strip below as a separate frame, in order along the film. Frames it could not separate cleanly can be adjusted by their corners.