Convert MEF to TIFF — Free Online Converter
Convert Mamiya Raw Format (.mef) to Tagged Image File Format (.tiff) online for free. Fast, secure image conversion with no watermarks or registration...
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About MEF to TIFF Conversion
TIFF is the definitive format for medium format photography archival and professional production. Converting Mamiya MEF RAW files to TIFF preserves the full quality of the demosaiced sensor data in the format recognized by every publishing house, museum, gallery, and print facility worldwide. TIFF supports 8-bit and 16-bit color depth, lossless compression, ICC profiles, and the richest metadata structure of any raster image format.
For Mamiya 645AFD, 645DF, and Phase One back-equipped cameras, TIFF represents the ideal balance between quality preservation and format accessibility. The 14-16 bit RAW data can be converted to 16-bit TIFF for maximum tonal range, or 8-bit TIFF for broader compatibility — in either case, the lossless compression ensures zero quality degradation from the conversion.
Why Convert MEF to TIFF?
TIFF is the institutional standard for photographic archival at the Library of Congress, major museums (Smithsonian, MoMA, National Gallery), and scientific organizations worldwide. When medium format photographs need to enter these institutional collections — as fine art acquisitions, documentary records, or scientific documentation — TIFF is the required format.
In commercial production, TIFF is the standard exchange format between photographers, retouchers, and print production. Converting MEF to 16-bit TIFF preserves the full dynamic range of the medium format sensor, enabling extensive post-processing without banding or tonal artifacts. This is the quality standard that medium format photography demands.
Common Use Cases
- Create museum-grade archival copies of Mamiya medium format photographs in 16-bit TIFF
- Deliver Phase One medium format captures to prepress production in the industry-standard format
- Convert MEF files to TIFF for retouching handoff between photographer and retoucher
- Generate archival-quality TIFF masters from Mamiya studio sessions for institutional collections
- Prepare medium format photographs as TIFF for fine art printing and gallery exhibition production
How It Works
LibRaw (via Sharp) decodes the MEF file, interpreting the medium format sensor's Bayer pattern at 14-16 bit depth. The demosaiced RGB image is written as a TIFF file with configurable compression (LZW, ZIP, or none) and bit depth (8 or 16 bits per channel). An sRGB or Adobe RGB ICC profile is embedded. EXIF metadata from the MEF file is mapped to the TIFF's EXIF IFD, and IPTC fields can be populated for professional asset management. A 60 MP capture produces a 16-bit TIFF of approximately 340 MB uncompressed or 100-150 MB with LZW compression.
Quality & Performance
TIFF with lossless compression preserves the exact pixel values from the demosaiced MEF data. At 16-bit depth, the full tonal range of the medium format sensor is maintained, enabling extensive exposure adjustment, color grading, and shadow recovery in post-processing without banding. This is the highest quality output format for medium format RAW conversion — the gold standard for professional and institutional use.
Device Compatibility
| Device | MEF | TIFF |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Tips for Best Results
- 1Use 16-bit TIFF for medium format archival — it preserves the full benefit of the 14-16 bit sensor
- 2LZW compression reduces file sizes by 30-50% with zero quality loss — always enable it
- 3Add IPTC metadata for professional asset management: title, photographer, copyright, keywords
- 4Embed an ICC color profile (sRGB or Adobe RGB) for consistent cross-platform color rendering
- 5Keep original MEF files as RAW masters even after TIFF conversion — they preserve full processing flexibility
MEF to TIFF is the definitive archival and production conversion for Mamiya medium format photography. 16-bit lossless TIFF preserves the extraordinary quality of these sensors for institutional, commercial, and fine art applications.