The Sony HVR-Z1U and HDR-FX1 HDV cameras are basically an identical camera with the exception of a few key features. They are built on the same 3-CCD system, tape transport, and 4.5mm to 54mm lens (32.5mm to 390mm equivalent 35mm FOV). Z1U is the “pro” model and adds XLR audio, a 50Hz mode, and a number of additional menu settings and firmware-related tools (addl. Cine gammas, etc). For a complete breakdown of the two models, check this chart.

The point of this post is not to address the featureset of two HDV cameras that are getting somewhat long in the tooth, it is to talk about something that I haven’t found anywhere online before. One of the differences between the two cameras is the fact that the Z1U shows a numeric zoom scale on the display. With the lens at full wide it displays Z00, shows Z50 at about half zoom, and Z99 at full telephoto. In contrast, the FX1 simply displays a visual zoom scale indicator on screen. The only way to accurately return to a certain focal length is to use the physical zoom ring, which has a limited scale of mm markings on it. This scale matches the markings on the Z1U’s ring, which can be correlated to the internal numerical percentage scale. In recent testing it became necessary to determine what that correlation was, so without further ado here are the equivalent Z-numbers that relate to the Z1U’s zoom ring markings (and therefore also correlate to the markings on the FX1).

And here is a visual reference of what Z82, Z94, and Z98 look like on the zoom ring. FYI, Z82 is just past the f/2 to f/2.2 breakpoint and Z94 is just shy of the point where the lens goes from f/2.4 to f/2.6.