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Hasselblad 3FR
The raw format for Hasselblad's legendary medium format cameras.
3FR is the proprietary raw image format used by Hasselblad cameras. It is designed to capture the immense amount of data produced by medium format sensors, which are significantly larger than full-frame sensors. 3FR files are compressed to save space on the memory card. When imported into Hasselblad's Phocus software (or other compatible editors), they are typically converted into the uncompressed FFF format for editing.
3FR files contain 16-bit sensor data. This high bit depth is crucial for medium format photography, which prioritizes color accuracy and tonal gradation above all else. The format is TIFF-based but heavily customized. It includes specific metadata for Hasselblad's lens corrections (DAC - Digital Auto Correction), which are essential for achieving the optical perfection the brand is known for.
Hasselblad introduced 3FR with their H-system digital backs. It remains the standard capture format for their H and X system cameras.
GIF 87a
The original 1987 specification of the Graphics Interchange Format.
GIF 87a is the original version of the GIF format, published by CompuServe in 1987. It introduced the core features that made GIF famous: LZW compression for small file sizes and support for 256 indexed colors. However, unlike the ubiquitous GIF 89a, this original version lacks support for transparency, animation delays, and metadata comments.
A GIF 87a file starts with the header signature `GIF87a`. It defines the Logical Screen Descriptor and the Global Color Table. While it supports multiple image blocks within a single file (which could conceptually form an animation), it lacks the 'Graphic Control Extension' block introduced in 89a. This means there is no standard way to define frame delays, disposal methods, or transparent indices.
Developed by CompuServe in 1987 to provide a hardware-independent, compressed color image format for their online service. It replaced the earlier RLE-based formats and was designed to be efficient over slow modems.
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