Screengrab from Jason Vong’s video

CameraLabs posted the full Sigma 24-70mm f/2.8 FE review and concludes:

The Sigma 24-70mm f2.8 DG DN Art is a viable alternative to the original 24-70mm f2.8 lenses from Sony and Panasonic – not to mention Canon and Nikon, should Sigma develop RF and Z-mount versions. Although the lens comes at a much lower price Sigma has designed it well: The lens is sharp within the APS-C image-circle, has no longitudinal color aberrations, shows little veiling glare in contra-light situations, and has a reliable autofocus. Unfortunately the Sigma becomes gradually softer at closer focusing distances right down to pretty mushy results at minimum object distance. This may make the lens miss out on our top award, but it still clearly earns a recommendation.

Good points:

• Constant f2.8 focal ratio.
• Sharp and contrasty in the APS-C image circle.
• Good black levels in contra-light situations.
• Reliable AF operation
• Can swap mounts (at a cost) between Sony E and Leica L-mount.

Bad points:

• Field curvature and softer performance at closer distances.

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Sigma 24-70mm FE lens at Amazon, BHphoto, Adorama, Calumet DE, FocusCamera. WexUK

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And this is Jason Vong’s take on the new lens:

Asobinet posted this accurate size comparison between the new Sigma 24-70mm FE, Sony 24-70mm f/2.8 GM and Tamron 28-75mm f/2.8 FE zoom lenses. We finally have some nice choices :)

Sigma 24-70mm FE lens at Amazon, BHphoto, Adorama, Calumet DE, FocusCamera. WexUK
Sony 24-70mm GM lens is at Amazon, BHphoto, Adorama.
Tamron 28-75mm lens at at Amazon, Bhphoto, FocusCamera, Adorama, Amazon DE, Amazon UK, Amazon FR.

Photons to Photos published the Dynamic Range score of the new Sony A9II. As you can see the new camera performs a bit better than the first generation Soy A9 at 100 ISO. At Medium and High ISO the performance is exactly the same.

Sony A9II at BHphoto. Adorama. Amazon. FocusCamera. BuyDig. Calumet DE. WexUK. ParkCameras.

These are the best APS-C E-mount lenses according to Dpreview:

Best kit lens: Sony E 18-135mm F3.5-5.6 OSS
Best prime lens: Sigma 30mm F1.4 DC DN | C
Best wide-angle zoom lens: Sony E 10-18mm F4 OSS
Best telephoto zoom lens: Sony E 55-210mm F4.5-6.3 OSS
Best macro lens: Sony FE 50mm F2.8 Macro
Best travel zoom lens: Tamron 18-200mm F3.5-6.3 Di III VC

Ted Forbes:

All of the lenses in this video were released in 2019. I picked winners based on 5 different categories – best ultrawide lens, best wide angle lens, best normal lens, best portrait lens, and best long telephoto. And I have the overall winner for 2019. These are all selected on the basis of optics, features, size and price.

Links:
Sony 135mm GM at Amazon, BHphoto, Adorama and FocusCamera. EU at ParkCameras, WexUK and Calumet DE.
Sony 35mm f/1.8 FE at Adorama, Amazon, FocusCamera, BHphoto and Henrys. EU at Calumet DE, ParkCameras, WexUK, Calumet NL.

If you want to knwo how good the Sony 100-400mm GM lens works for Astrophotography check out the video on top.

100-400mm FE GM at BHphoto and Amazon

Opticallimits tested the new Sigma 45mm f/2.8 DG DN lens and they really like the lens a lot:

There are probably two camps of people out there when it comes to the Sigma 45mm f/2.8 DG DN Contemporary. One camp is surely asking what the fuzz is all about – after all it’s a comparatively slow speed and expensive lens – whereas the other camp is rather enthusiastic about it because the lens combines high product quality in a low-profile package – perfectly aligned to street photography for instance. In terms of optical performance, the results are pretty impressive. The center quality is very sharp at f/2.8 and the outer image field is pretty good, too. Stopped down to medium aperture settings, the center reaches superb levels and the border/corners improve to very good quality. Lateral CAs are quite negligible. However, the native vignetting, as well as image distortion, are relatively high for such a lens but then Sony’s image auto-correction will take care of this. The technical quality of the bokeh is decent albeit not perfect.

The mechanical quality of the lens is nothing short of outstanding and it puts much higher priced offerings to shame. The all-metal construction looks and feels great. And how often do we see a metal lens hood – and this one isn’t just a smooth barrel but a fluted one. The damped(!) focus ring, as well as the addition of an aperture ring,  is also something special. If you are nit-picky you may criticize the partial weather-sealing. The AF is fast and silent.

The biggest flaw of the lens doesn’t relate to its characteristic but to its name – it is just no “Contemporary” lens. It is ARTier than some designated ART lenses in Sigma’s lineup for sure (BTW, ART is not about speed only – e.g. the Sigma 30mm f/2.8 DN ART is/was just as fast). So regarding the “love it” or “hate it” group question, yours truly is certainly in the first group – thus highly recommended! Your mileage may vary though.