Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your CR2 images to PNG64 format. This tool works for both professionals and casual users. Convert your images to PNG64 in seconds.
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Canon RAW 2
The standard raw format for Canon DSLRs from 2004 to 2018.
CR2 (Canon Raw version 2) is the proprietary raw image format used by Canon EOS digital SLR cameras from the mid-2000s until the introduction of the CR3 format in 2018. If you shot with a Canon 5D Mark II, 7D, or Rebel T3i, you have thousands of these files. Like all raw formats, a CR2 file contains the unprocessed data from the image sensor. It is not an image yet; it is a dataset of light intensity values that must be 'demosaiced' by software to create a viewable picture. This allows you to change the white balance, recover highlights, and pull detail out of shadows long after the photo was taken.
CR2 is based on the TIFF file structure. It uses lossless compression to store the sensor data, which is typically 12-bit or 14-bit depending on the camera model. The file contains the raw image data, a full-size JPEG preview (for reviewing on the camera screen), and extensive 'MakerNotes' metadata that records every camera setting, from the lens used to the focus point selected.
CR2 replaced the older CRW format in 2004 with the release of the EOS 20D. It remained the standard for 14 years, making it one of the most widely supported and understood raw formats in history. It was eventually succeeded by CR3, which offers better compression.
PNG-64 (64-bit RGBA)
The ultimate format for transparency precision in VFX and compositing.
PNG-64 is the heavyweight champion of the PNG family. It combines the 16-bit per channel color depth of PNG-48 with a 16-bit alpha channel. This provides 65,536 levels of transparency, compared to just 256 levels in a standard PNG-32. This format is almost exclusively used in high-end visual effects (VFX), 3D rendering, and professional compositing. When you are rendering a CGI character to place into a movie scene, you need the edges to blend perfectly with the background, even after heavy color grading. PNG-64's 16-bit alpha channel ensures that semi-transparent pixels (like motion blur or hair) retain enough data to be manipulated without becoming jagged or discolored.
A PNG-64 file contains four channels: Red, Green, Blue, and Alpha. Each is 16 bits deep (16 x 4 = 64 bits). The 16-bit alpha channel is the defining feature. In an 8-bit alpha channel (PNG-32), a very faint shadow might only have 3 or 4 levels of transparency steps, leading to visible banding when contrast is increased. In a 16-bit alpha channel, that same faint shadow has hundreds of steps, ensuring it remains smooth under any processing.
Like PNG-48, PNG-64 has been part of the standard since the beginning but was largely ignored by the web community due to file size. It found its niche in the 3D and video production industries as a more accessible alternative to formats like EXR or TIFF for storing intermediate render passes.
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