New lens reviews by Mark Galer, Photographyblog, SonyAlphaLab, Marc Alhadeff

Lens review: Sony FE 100-400 F/4.5-5.6 GM OSS
1.4X Tele Converter Album: https://flic.kr/s/aHsm1ZoFPW
FE 100-400 F/4.5-5.6 GM OSS Album: https://flic.kr/s/aHskYWnqJR

Sony FE 12-24mm F4 G Review by Photographyblog:

The Sony FE 12-24mm F4 G is a very good, if pricey, ultra-wide-angle zoom lens for Sony A9/A7/A7R II/A7S full-frame cameras. It delivers excellent sharpness in the centre of the frame almost throughout the full aperture and zoom range and also performs very well at the edges of the frame too, although the performance at 24mm isn’t as good as the rest of the zoom range. The Sony FE 12-24mm F4 G lens does suffer from some distortion and vignetting, but chromatic aberrations are very well-controlled and it can even create some fairly nice bokeh effects when shooting wide-open at 24mm.
Lens at [shopcountry 60804]

Sony FE 24-70mm f/2.8 GM Lens Review by SonyAlphaLab:

The images produced by the FE 24-70mm f/2.8 GM Lens are optically phenomenal at the end of the day in my opinion. I would not mind having this lens in my stable at all! If I were shooting weddings for example with the Sony A9 or Sony A7r II, I would certainly have this lens mounted most of the time for my style of shooting.
Lens at [shopcountry 62046]

Marc Alhadeff tested the new Tokina 20mm FE lens:

The Borders / corners are clearly less good than the centre wide open and this persist until F4, at F5.6-F8 you get consistent excellent results across the frame
Lens at [shopcountry 62047]

Confirmed with actual measurements: A7rII has Higher DR than the new Nikon D850 (except ISO 64)

Photonstophotos now published the real world Dynamic Range measurements of the new Nikon D850. And with the exception of ISO 64 and 400 the 2,5 years older Sony A7rII performed better across the entire ISO range.

Just to be clear, we are talking about minor differences that will certainly not make your photos better and worse. What is interesting about this test is:

1) There has been no DR progress on the D850 compared to the 2,5 year older Sony camera.
2) Sony needs to add a serious native ISO 64 support to squeeze out the best performance (Note: As reported by Jim Kasson the A7rII has a “fake” ISO 64 setting).
3) Sony might has reserved the top edge tech for the 2018 Sony A7rIII model (Note: Nikon surely uses Sony manufactured sensors).

And to not pass as a Sony fanboy. From a usability point of view the D850 beats hands down the Sony. Sony needs to improve a lot and with the A9 they surely did show they are on the right path on this.

Reminder: $200 off and free extras on the A7rII at Adorama, BHphoto and Amazon.