This is the lens most associated with the new Sony PXW-FS7 its the Sony “G” 28-135mm f4 G lens, I will assume the 28-135 is a full frame figure so taking into account the 1.39x crop factor on the Super 35mm sensor the FS7 will have an angle of view of 39-187mm (35mm equivalent).
The ability to zoom is built into the FS7 with this interesting servo zoom control, personally Sony have hit the right sweet spot by finally delivering a 4K camera that has a servo zoom facility. Far to many cameramen and women have avoided the large sensor market because the cameras take them well out of their comfort zone, having a servo zoom not only enhances the FS7 but allow it to be used in run and gun situations…a major bonus.
The no lens option is cheaper but is it value for money…
If you buy the camera with the lens it works out at £1550 more but buy the camera without a lens and purchase it at WEX it will cost you £2300 thats a whopping £750 more for the same lens.
Because of the Super 35mm sensor you have a far wider range of lenses and lens mounts for the FS7 lets look at some non servo alternatives.
The first thing you need to consider is the crop factor (1.39)…if you buy a full frame (FF) lens like the Sony FE 24-70mm you will need to multiply the focal length by 1.39x for a 35mm equivalent…the FF 24-70mm will have a 35mm equivalent of 33-97mm.
The Sony E 16-70mm although made for an APS-C sensor still has a crop factor of 1.39.
This comparison chart from CVP explains how each sensor size has a different crop factor.
Multiply a lens’ focal length by a camera’s factor to get the focal length of a lens which, when used on a full-frame or 35mm film camera, gives the same angle of view as that lens does on that digital camera.
A 100mm lens on a 1.39x factor camera shows the same area of view that a 139mm lens would show on a 35mm film or full-frame camera.
Sony have completely confused the “E” marketplace with FF and APS-C lenses…why did Sony not make the A7 range of cameras “A” mount, this would have made far more sense and given A7 owners a far greater range of FF lenses.
The Zeiss 35mm PL lens is still 35mm no matter what camera you mount it onto but the sensor size dictates the crop so on the FS7 (Crop 1.39 for a Super 35mm sensor) the 35mm prime lens will have a 35mm equivalent of 48mm.
The Sony PXW-FS7 will tick a lot of boxes including the servo zoom 28-135mm f4 lens, I am not so sure why Sony are insisting on bringing out so many constant aperture (CA) f4 lenses when they have a range of good CA f2.8 “A” mount lenses on offer though you will have to factor in a lens adapter and a 1.39x crop.