I can now confirm that the Sony FS7 with 4K Super 35mm sensor using the Sony FE 24-70mm f4 ZA OSS Carl Zeiss lens does indeed have a 1.5 crop factor. I also now have the cracking 10-18mm f4 wide zoom which has an effective field of view of 15 – 27mm very useful indeed. Sony have E mount and FE mount lenses, very confusing. FE indicates Full Frame E mount lenses for the Sony A7s etc. but the FS7 uses a Super 35mm sensor which allows you to use FE or E mount without vignetting. This is especially useful for a larger choice of lenses.
The 24-70mm is a full frame lens but on the FS7 with a 1.5x crop the lens is equivalent to a 36-113mm.
Still no sign of my servo zoom but a reader has posed the question about the wide side of this lens…will it be wide enough. The Super 35mm sensor will always cause a 1.5x crop no matter what lens you use. The 28-135 with a 1.5x crop will be the equivalent of a 42-203mm lens. Having the 10-18mm lens (15-27mm 1.5x crop) gives me a two lens camera bag. The Sony FE 24-70 f4 lens is my standard zoom for my Sony A7s.
In the earlier days of my photographic career I was more than happy with a standard lens (50mm) it was usually the sharpest lens you could buy and wide lenses were not as sharp back then. Today wide lenses have improved enormously, especially wide zooms.
My Sony 10-18mm f4 lens is just the job for getting dramatic landscapes and interior shots. The quality of the optics are superb and having a constant aperture is a major bonus.
Back to the question can I live with a servo zoom at an angle of view of 42mm at the wide end, no problem, 30mm would have been better but to be honest I have a 10-18mm lens in my bag and you don’t need a wide servo zoom lens so as far as my filming is concerned I am covered.
If I get any further lens it might be the Zeiss 35mm f/1.4 FE lens due late March which would cover any lower light filming and interviews.