MOS to PDF Converter
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Supports: MOS
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Need help?How to Convert MOS to PDF Online
- Upload Your MOS Files — Drag and drop or select one or more MOS (Leaf/Mamiya RAW) image files.
- Choose Combine Mode — Select Single PDF to merge all images into one multi-page document, or Individual PDFs to create a separate PDF per image.
- Set Page Options — Choose Paper Size (Original, Letter, A4, Tabloid, Legal, Executive, and more — default is A4), Page Layout (Portrait or Landscape), Margin (No margin, Narrow 0.5", Moderate 0.75×1", Normal 1", or Large 2×1"), Image Placement (Cover to fill the page, or Contained to fit within margins), and Image Alignment (Top, Center, or Bottom).
- Adjust Image Quality (Optional) — Set Image Quality % (1–100, default 75) to control JPEG compression within the PDF. Choose a Compression Type: Screen (smallest file), Ebook, Default, Prepress, or Printer (highest quality).
- Convert & Download — Click Convert and download your PDF files.
Why Convert MOS to PDF?
MOS is a RAW image format from Leaf Aptus digital backs and Mamiya medium-format cameras. These files contain unprocessed sensor data with maximum detail and dynamic range — but almost no software outside of specialized RAW editors (Capture One, Adobe Camera Raw) can open them. Converting to PDF makes your Leaf/Mamiya images viewable on any device, shareable via email, and printable without specialized software. PDF preserves the image at your chosen quality while adding page layout controls.
MOS RAW vs PDF
| Feature | MOS (Leaf/Mamiya RAW) | |
|---|---|---|
| Viewable without special software | ❌ | ✅ Universal |
| Editable (exposure, white balance) | ✅ Full RAW editing | ❌ |
| Shareable via email | Impractical (large, unsupported) | ✅ |
| Printable | Requires RAW editor | ✅ Direct print |
| Multi-page support | ❌ (single image) | ✅ |
| File size (80 MP image) | ~80–120 MB | ~5–15 MB (depending on quality) |
Use Cases
- Client proofs — Photographers using Leaf Aptus or Mamiya digital backs can convert RAW files to PDF for client review without requiring RAW editing software.
- Print portfolios — Combine multiple MOS images into a single multi-page PDF portfolio with consistent page size and margins.
- Archival sharing — Share medium-format RAW captures with collaborators who don't have Capture One or Adobe Camera Raw.
- Contact sheets — Convert a batch of MOS files into a single PDF with one image per page for quick visual review.
What cameras produce MOS files?
MOS files are created by Leaf Aptus series digital backs (Aptus 22, Aptus 54s, Aptus 65, Aptus 75, etc.) and some Mamiya medium-format cameras. These are professional-grade systems used in commercial and fine art photography.
What Paper Size should I use?
A4 (default) works for most purposes. Use "Original" to match the image's native aspect ratio without cropping. For US standard printing, choose Letter. For large prints, choose Tabloid or Ledger.
What is the difference between Cover and Contained placement?
Cover fills the entire page with the image (may crop edges). Contained fits the image within the margins without cropping (may leave white space). Use Cover for full-bleed prints and Contained for framed presentations.
What Compression Type should I use?
Screen produces the smallest files (good for email/web). Prepress and Printer produce the largest files with maximum quality (good for professional printing). Ebook is a balanced middle ground.
Can I merge multiple MOS files into one PDF?
Yes. Upload multiple MOS files and select "Single PDF" under Combine mode. All images will be placed into a single multi-page PDF document with your chosen page settings.