The resolution test (resolution meaning the MTF50 function) of the Canon EF 24-70 mm f/4L IS USM was based on RAW files from the Canon EOS 5D Mark III camera. In that case the decency level is situated around 30-32 lpmm and the best fixed focus lenses can go as high as 44-47 lpmm. First let’s check how the tested lens performed in the frame
Sample Image Files Interior, wide-open at f/4 at at 24mm, hand-held at 1/8 second 5D Mark III at ISO 100. bigger, full-resolution or Camera-original © 22 MP file. Awning, wide-open at f/4 at at 24mm, hand-held at one-third of a second. 5D Mark III at ISO 800. bigger. The Canon EOS RP enables users to capture RAW and JPEG format files. We've provided some Canon RAW (CR3) samples for you to download (thumbnail images shown below are not 100% representative). Sample images taken with the Canon RF 24-70mm F2.8L IS USM mirrorless camera lens. Canon EF 24-70mm f/4L IS USM preview. We've had our hands on Canon's latest zoom, the EF 24-70mm f/4L IS USM, for a couple of hours and prepared a quick preview. It's clearly designed primarily as a 'kit' lens for the EOS 6D, but of course will work just as well on Canon's other full frame bodies such as the EOS 5D Mark III, as well as APS-C javPjP.