raw format

What is a .MOS file?

MOS is the raw format from Leaf digital backs, used on medium-format studio cameras for maximum image quality.

Full name
Leaf Raw
Developed by
Leaf
Released
2002
Extension
.mos
MIME type
image/mos
Transparency
No

How to open a MOS file

MOS opens in Capture One, Leaf Capture and Lightroom; convert to DNG/TIFF for archiving.

What MOS files are used for

Professional photography

Maximum dynamic range and editing latitude.

Color grading

Recover highlights and shadows non-destructively.

Archival masters

Keep the untouched original alongside exports.

Strengths & limitations

✔ Strengths✖ Limitations
Maximum editing latitudeNo transparency support
Limited support — may need converting
Needs raw-capable software

Need more than a conversion?

Remove the background from MOS images, upscale to 4K, or generate new visuals with SharkFoto AI.

Frequently asked questions

MOS is the raw format from Leaf digital backs, used on medium-format studio cameras for maximum image quality.

MOS opens in Capture One, Leaf Capture and Lightroom; convert to DNG/TIFF for archiving.

MOS is an unprocessed raw container, so no detail is discarded.

Use SharkFoto's free tools — upload your MOS file and convert it to a more convenient format in seconds. It's free, processed securely and never stored.

No — MOS doesn't store transparency; convert to PNG or WEBP if you need it.