First lets try to clarify what is meant by HDR. HD content is delivered in an 8 bit per color stream with a Log curve that conforms to Rec.709. A good source for this standard is: Rec.709 . That standard supports 10 bit recording but not even the full 0-255 encoding range is used for HD broadcast. The industry has issued another range of standards that are clustered around Rec.2020 which offers a vision for the future whereby content is encoded in a 10-16 bit code depth. Right there is a problem – shouldn’t just one bit depth be used for a standard? The resulting High Dynamic Range made possible by the higher coding range was often referred to as HDR. However the high dynamic range is just a part of the specifications surrounding Rec.2020 . Extended color range even higher frame rate has been added to the mix. How could I forget the higher resolution with support for up 8k images. This is where the problem of definition arises, whenever a standard is so complicated that it is impossible to implement all at once many subsets arise. There are at least three well known subsets for Rec.2020. One problem is that the term HDR, which is really only one part of Rec.2020, has emerged as a marketing term that covers all of the standard. When the question of whether a camera supports HDR arises you have to ask whether the narrowest definition is implied or the full all encompassing marketing term.
The best approach, to determining whether the FS7 supports HDR seems to be to ask Sony but they have not really been forthcoming about the matter. They neither publicly claim or refute the status of the FS7 regarding HDR. On the other hand Sony will make the HDR claim for the F55 and F65 cameras. So the CineAlta range supports HDR but is the FS7 classified as being CineAlta?