There’s no excuse for not offering this as an option. Lossless data compression algorithms have been around for decades (since the 1970s). But I’m dreading working with the files because they still have no option for lossless compression on their RAW files. I’m really excited about this body because of the combination of high resolution and great dynamic range. Recently Sony announced the A7R IV camera body with a 61 MP sensor. This is horrible and managing this extra data (especially as it works it’s way into all my various backups) is painful. My 42 MP RAW images are about 85 MB each, or about 2 MB per megapixel. The drawback is that uncompressed files are huge. No more worrying about whether an artifact was going to show up. This is great because you could take advantage of all the data coming off the wonderful sensors. That may be true if you shoot in controlled lighting like a studio but as a landscape photographer I definitely run into this problem - see my examples below.ĭue to the outcry from the user base, Sony decided to release an uncompressed RAW option in late 2015. Some photographers say that they’ve never seen these and it’s a theorectical issue only. The drawback of the compressed format is that you are losing data from the file which can sometimes result in visible image artifacts. This is about par for the course for RAW formats provided by any of the major camera manufacturers. My 42 MP files from my A7RII camera take up on average about 43 MB per image or about 1MB per megapixel. The lossy compression scheme works very well for saving space. Currently they only offer two methods for saving RAW files:ĭid you notice what’s missing? Sony doesn’t offer a lossless compressed RAW file unlike every other camera manufacturer. One of the curses of shooting with Sony cameras is their RAW file format. Sony Raw Compression Artifacts: Real Examples
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