On the surface it definitely seems like Sony is restricting the capability of the F5 in order to create marketable differences between it and the F55. Now let's talk a little bit about the implications of this little hack. By replacing that line (from the F5 preferences) with the resolution settings line from the F55, you can trick the F5 into recording internal 4K. txt file controls a different aspect of the camera's preferences, and line 150 is the one that controls resolution. txt file, a file that can be edited to include 4K resolution, saved, and then loaded back into the camera.
Instead, Ream figured out that the F5 saves its internal preferences to a simple unprotected. It should be noted that this "hack" from Ream is not actually a firmware hack or some kind of tampering with the camera's physical hardware. There are a few other differences between the two cameras, primarily the fact that the F55 has a global shutter sensor, more HFR options, and an improved color gamut. By comparison, the Sony F55, which comes in at $29,000, has the ability to shoot 4K internally to Sony's XAVC codec. That device will set you back another $5500. The Sony F5, which comes in at roughly $16,500 for the body only, is a 4K enabled camera, but only when the proprietary R5 recorder is attached. Now that you've heard about F5 hack, here's a bit of a primer on why this is so significant. You can skip ahead to the 11:10 mark in the podcast to get directly to the conversation about the F5, and to about 18:20 to get to the part about the technical process behind hacking the camera. So what exactly did Ream do to his camera in order to coax internal 4K from his F5? He shared the technique in the most recent version of the ExtraShot podcast. Furthermore, this hack raises some interesting questions about the ethics of companies limiting the functionality of their products in superficial ways. Paul Ream, a working cinematographer, recently figured out how to hack the Sony F5 so that it enables the camera to shoot 4K internally, a task which significantly closes the performance gap between the F5 and its much more expensive big brother, the F55. However, up to this point, we haven't really seen or heard about folks hacking higher-end cameras in order to increase performance.
For the past few years, the practice of hacking a camera's firmware in order to increase the feature-set of said camera has been commonplace and quite popular, especially in the case of the original GH2 hack and, of course, Magic Lantern with Canon DSLRs.
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