What is the FFF file format?
.fff is Hasselblad's proprietary FlexRaw camera raw format, used by both Flextight film scanners and Hasselblad H- and X-series medium-format digital cameras. The format originated with the Imacon Flextight scanner series around 2000; Hasselblad acquired Imacon in 2004 and continued using .fff across its camera lines.
The file is a TIFF-based binary container - little-endian, with the standard 49 49 2A 00 signature - extended with proprietary Hasselblad MakerNote IFDs. These private tags carry scanner or camera calibration data, ICC profile references, and unprocessed CCD or CMOS sensor data at 16 bits per channel, yielding 48-bit colour after demosaicing. Flextight scanner outputs can exceed 200 MB per scan; the Hasselblad H6D-400C MS multi-shot camera produces files up to 400 MB at 400 megapixels.
Unlike the related .3fr format (used by Hasselblad H-series camera bodies), .fff covers both scanner and camera output. Some camera models write a sidecar .DAT file with the same base name.
LibRaw and dcraw can decode .fff files. Adobe Camera Raw and Lightroom support most Hasselblad .fff variants. Hasselblad's own Phocus software provides the deepest metadata access, tethered shooting support, and colour processing pipeline.
Security & safety
RISK: LOWFFF is a raw image format; no executable code. No known malware vectors using this extension.
Format details
in a nutshell- Gravis Ultrasound PnP Bank File - Legacy audio bank format for Gravis Ultrasound sound cards (1990s); entirely unrelated to the image format.
- FileMaker Pro Recovered File - Older FileMaker Pro versions used .fff for recovered/temporary database files.
Programs that open FFF files
Windows6 apps
Microsoft Windows Photos
Built-in Limited support; requires Windows Camera Codec Pack or manufacturer codec. Not reliable for all FFF variants. 
Adobe Photoshop Camera Raw
Paid Open FFF directly; Camera Raw dialog opens automatically for raw processing. 
Hasselblad Phocus
Free File → Import or drag FFF files into the Phocus library; adjust and export as TIFF/JPEG.
Adobe Lightroom Classic
Paid Import FFF files via File → Import Photos; apply Develop adjustments then Export. 
macOS3 apps
Apple Preview
Built-in Can open many FFF files via macOS raw decode support, but no raw adjustment controls. Technical details
deep spec| Container | TIFF (Tagged Image File Format) with proprietary Hasselblad IFDs |
| Byte order | Little-endian |
| Magic bytes | 49 49 2A 00 (TIFF little-endian signature) |
| Bit depth | 16 bits per channel (48-bit RGB after demosaicing) |
| Compression | Uncompressed raw sensor data; some models use lossless compression |
| Metadata | Proprietary Hasselblad MakerNote IFDs + standard EXIF/TIFF tags |
| ICC profile | Embedded reference path in MakerNote block |
| Maximum resolution | Up to 400 MP (Hasselblad H6D-400C MS multi-shot) |
| Scanner output | Up to 8,000×10,000 px (Flextight X5, medium-format film) |
| Typical file size | 50 MB - 400 MB |
| Sidecar files | Optional .DAT (camera metadata) or .icc (colour profile) |
| Open-source decoding | LibRaw, dcraw |
| Released | 2000 (Imacon Flextight scanner series; Imacon acquired by Hasselblad 2004) |
| Latest version | 3F (current; used by Hasselblad H- and X-series cameras as well as Flextight scanners) |
FFF conversions
Community Q&A
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