APEX Film Lab / Guides
16-Bit TIFF vs JPEG Film Scans
JPEG is convenient for finished photographs. A 16-bit TIFF is useful when you want a substantial editing master. Neither format can improve detail that the scanner did not capture.
Bit depth: how finely tones are recorded
Bit depth describes tonal precision, not pixel dimensions. An 8-bit image has 256 possible values per channel; a 16-bit representation has 65,536. In colour images, “16-bit” usually means 16 bits for each red, green and blue channel. More available values can help during strong tonal adjustments, but do not mean a scan contains 16 stops of dynamic range. Adobe explains bit depth and editing support.
Compression: file size versus retained data
Conventional JPEG uses lossy compression to reduce file size. TIFF is a container that can use several compression methods. An uncompressed TIFF, or one saved with lossless compression such as ZIP or LZW, preserves the stored pixel values. TIFF is not automatically lossless: some TIFF options use JPEG compression. Adobe’s format guidance covers these choices.
| Consideration | JPEG | 16-bit TIFF |
|---|---|---|
| Typical role | Finished image for viewing and sharing | Master file for editing and reuse |
| Tonal precision | Usually 8 bits per channel | 16 bits per channel |
| Storage | Smaller; easy to transfer | Larger; plan storage and backups |
| Editing | Suitable for modest adjustments | Useful for extensive tonal and colour changes |
| Compatibility | Widely supported by websites and devices | Check your editor and delivery requirements |
How much bigger is a TIFF?
Consider an illustrative 8,000 × 5,333-pixel RGB image: about 42.7 megapixels. At 16 bits per channel, its uncompressed pixel data alone is about 256 MB, before metadata or layers. At 8 bits per channel, it is about 128 MB. A JPEG can be much smaller, depending on image content and the quality setting. These are calculations, not promised APEX file sizes.
When JPEG is enough
A well-prepared, high-quality JPEG is often enough for social media, online galleries, family sharing and many prints. If the colour and contrast are already right and you only need small adjustments, a larger master may offer little practical benefit for that use.
A JPEG can have the same pixel dimensions as a TIFF. The extension alone does not tell you how large a print you can make. Keep the original JPEG and avoid repeatedly overwriting it after edits.
When a 16-bit TIFF is worth choosing
Choose a 16-bit master if you plan substantial grading, need to revisit the image for different outputs, or want to keep more tonal precision through editing. It is especially useful for a LOG grading workflow. Check that your software retains 16-bit data while you work.
Extra bit depth is useful only when the capture and processing contain meaningful information. Enlarging an 8-bit JPEG into a 16-bit TIFF does not recreate discarded tonal values. Likewise, a TIFF cannot restore missed focus, clipped highlights or lost negative detail.
A practical workflow
- Keep the supplied scan as your original.
- Edit a separate master and back it up.
- Export JPEG copies at appropriate sizes for sharing.
- For printing, use the file format and colour profile requested by your print provider.
Choose the scan, then the file
The LOG, CINE and CLASSIC profiles determine the starting look. File format determines how that image is stored. Read about resolution and actual detail, or explore Scannatron X1.
APEX offers Develop + Scan and Scan Only for 35mm and 120 film.