If you're planning to get an NEX-FS100, you're going to have to think about what lenses you will use with it. Because you'll want to use E-mount lenses if you want to have optical image stabilization and auto-focus. If you use A-mount lenses (with the A-E mount adapter) you will probably still have auto-focus (though it will be interesting to see how well that performs, if it's like the NEX-VG10, it's not the greatest.) But if you use any other lenses, you lose all that.
The product specification for the NEXFS100UK says:
Image Stabilizer: Optical SteadyShot | Optical SteadyShot with Active ModeBut the NEXFS100U (body without the lens) lists:
(nothing)That's because the E18-200mm F3.5-6.3 OSS zoom lens included in the kit model supports optical SteadyShot and auto focus.
Meanwhile, The DSLR Shooter, while noting that the E-Mount provides:
The beauty of short flange distance is that you can practically use any lens via a 3rd party adaptor. There’s definitely possibility of putting your nikon or canon mount lenses to good use.Laments "8 bit, lack of HD-SDI and no built in ND" The latter, according to one source, is a limitation of that E-Mount. Supposedly there wasn't enough room to include neutral density filters.
DSLR Shooter: Sony Announces: NXCAM NEX-FS100
The sensitivity of the camera - unsurprisingly - depends upon the lens you use. Sony's own press release gives two different sensitivity numbers for the camera (at different points in the release):
with the f3.5 E18-200mm the NEX-FS100UK enables shooting in illumination as low as 1.5lux when using a fixed shutter speed of 1/30, auto gain and auto irisBut elsewhere:
while providing the sensitivity necessary for shooting at a minimum illumination of 0.28 lux (when using a fixed shutter speed of 1/30, auto gain and an iris setting of F1.4).your mileage may vary...
The NEX-FS100 uses the same sensor as the PMW-F3, but while Sony has released the total number of pixels in that sensor (3.43MP), they won't say how those pixels are arrayed and used to produce the HD image. The press release just notes:
"The sensor also features the optimum number of effective pixels for shooting HD moving images"- what does that mean?
In one earlier report I noted a release date of May. The official press release notes that release of the NEX-FS100 and HXR-NX70 will come sometime between "July-September"
Press Release: Sony Expands its NXCAM Family of Products [PDF]