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Sony 12-24mm f/2.8 GM

NEW! Available for pre-order.

3 XA Elements, 2 Super ED elements, nano AR II and fluorine coatings, four focusing motors, dust and moisture sealed.

Sony 11+7 Bit File Format: Gapping

Sony uses an lossy-compressed 11+7 bit file format in all their A7 series cameras as well as most others. Meaning bits are thrown away to keep the file size down. Most of the time, it works very well.

In theory “should not be visible” is the operative principle in this Sony lossy format.

If this is so, surely all medium format camera vendors and Nikon and Canon could all save us a huge amount of wasted storage space by lopping off all those unecessary bits, e.g. 8 bits is plenty, so why this 12-bit / 14-bit / 16-bit wastage? But all my experience with Nikon and Sony and other brands tells me that “should not be visible” is a crock—fine enough most of the time, but brittle.

This new page shows what a Sony histogram and a Nikon D810 histogram look like, using RawDigger to show the gapping of both. It proves nothing, but is provocative enough in the glaring differences.

Sony 11+7 bit Lossy Compression: Gapping

Click for larger image. This is a crop of the full histogram.

Sony A7R raw histogram gapping

Save Big $$$$ on Memory for 2019 Mac Pro

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Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).



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SmallHD Reference Grade 17" Production Monitor with Teradek Sidekick II Receiver
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