Convert MEF to JPG — Free Online Converter
Convert Mamiya Raw Format (.mef) to JPEG Image (.jpg) online for free. Fast, secure image conversion with no watermarks or registration....
Secure Transfer
HTTPS encrypted uploads
Privacy First
Files auto-deleted after processing
No Registration
Start converting instantly
Works Everywhere
Any browser, any device
How to Convert
Upload your .mef file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .jpg file when it's ready.
About MEF to JPG Conversion
JPG is the most universally recognized image file extension, and converting Mamiya MEF RAW files to JPG produces the standard delivery format for commercial medium format photography. Mamiya 645AFD, 645DF, and Phase One back-equipped cameras capture exceptional resolution at 22-80+ megapixels, and JPG compression makes this professional imagery accessible for sharing, printing, and publishing.
This conversion is functionally identical to MEF-to-JPEG — the .jpg and .jpeg extensions refer to the same DCT-compressed format. The .jpg extension became the standard because early file systems limited extensions to three characters, and it remains the most common and universally accepted image extension today.
Why Convert MEF to JPG?
Every digital platform, printing service, and software application accepts .jpg files without question. Medium format MEF files are accessible only through specialized RAW processors like Capture One. Converting to JPG makes these high-value commercial captures available everywhere — from email attachments and client review portals to photo lab printing and magazine layout software.
The .jpg extension specifically offers marginally broader compatibility than .jpeg on some legacy systems that expect three-character extensions. For maximum universality when delivering medium format photographs to diverse clients with varying technical environments, .jpg is the safest extension choice.
Common Use Cases
- Create standard client deliverables from Mamiya 645DF+ fashion and beauty shoots
- Submit medium format photographs to stock agencies and publications requiring JPG uploads
- Build online portfolios showcasing Mamiya medium format work in universally viewable JPG
- Print Mamiya captures at photo labs and large-format print houses accepting JPG submissions
- Archive medium format session selects in compressed JPG for long-term storage efficiency
How It Works
The MEF file is decoded through LibRaw via Sharp, which handles the medium format sensor's Bayer pattern demosaicing, white balance, color matrix, black level, and gamma correction. The resulting RGB image is compressed with libjpeg-turbo's baseline DCT algorithm and saved with the .jpg extension. EXIF metadata is preserved. The output uses standard JFIF markers. At quality 90, a 60 MP Mamiya capture produces a JPG of approximately 10-15 MB.
Quality & Performance
JPG at quality 90-95 preserves excellent detail from medium format captures, with DCT artifacts imperceptible at normal viewing sizes. The lossy compression reduces the 14-16 bit RAW depth to 8-bit and introduces minor artifacts at 100% zoom, but the practical quality for printing and viewing is outstanding. Medium format sensors provide enough resolution that even at moderate compression, the output exceeds the quality of full-frame captures at maximum settings.
Device Compatibility
| Device | MEF | JPG |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No | Native |
Tips for Best Results
- 1Use quality 90-95 to honor the investment in medium format — lower settings waste the sensor's potential
- 2Always keep original MEF files as masters and deliver JPG copies to clients
- 3For web galleries, consider resizing medium format JPGs to reasonable dimensions (3000-4000 px long edge)
- 4Apply all color grading and retouching before final JPG export to avoid recompression
- 5Add copyright and contact metadata in EXIF/IPTC fields for professional delivery
MEF to JPG is the industry-standard delivery conversion for medium format commercial photography, producing universally accessible files that preserve the exceptional quality of Mamiya sensors.