Marc Alhadeff tested the Sigma 28mm F/1.4 FE lens:

The Sigma 28m F1.4 DG HSM Art (1250 euros) is a excellent lens 

Pros

• Excellent sharpness ,
• Fast, silent reliable AF
• Superb background blur and very beautiful 3D effect at F1.4
• Very good bokeh balls
• Low distorsion ,
• Low CA,
• Lightroom Lens profile available to correct vignetting and distorsion
• No Flare 

Average

• Price (1250 euros)

Cons

• Size 123mm
• Weight (985g)

Optically it is much better than the Sony 28mm F2 , and if you like the 28mm focal length and are ready to support its weight and size it is a highly recommended lens

–

Sigma 28mm f/1.4 at Bhphoto, Amazon, Adorama.

Sigma 45mm f/2.8 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys.
In EU at Calumet DE, ParkUK, WexUK.

I know the new Sigma 45mm f/2.8 FE lens lacks some of those exciting technical specs people like. It has a moderate f/2.8 aperture and it has not the “ART” badge Sigma uses for their superfast and best lenses. But if you think it through this lens is quite unique in the FE lens lineups: It’s compact and it has an aperture ring. Probably an ideal lens for street shooters like me. Let’s check out the latest reviews of this lens:

Bjorn Petersen (Click here) tested the new Sigma 45mm f/2.8 DG DN Contemporary Lens

It’s the type of lens that excites me most since it is so practical and pragmatic, but not lacking on any valuable front. You’ll notice I’m often comparing or relating this lens’s attributes to Sigma’s Art series throughout this article, but I didn’t necessarily note that this is a Contemporary series lens. The reason I did this is because I truly felt like the quality of this lens more resembled that of an Art lens than my former impressions of their Contemporary series. The only distinguishing feature that keeps this 45mm f/2.8 from being considered an Art prime, in my mind, must be the f/2.8 design… which, in the end, is something I consider one of its strengths.

Fred Miranda (Click here) writes about this lens:

The 45/2.8 Contemporary gets many things right but what makes it unique is the butter smooth rendering.
It’s well-built, compact and light. The aperture ring stops down in one-third increments with great precision. The manual focus ring has linear coupling and is a joy to use. Optimized for mid and long distances, it is capable of high resolution across the entire image field. The f/2.8 maximum aperture restricts the amount of blur and subject isolation, however, starting at the transition zone, rendering is smooth and pleasant. It’s refreshing to see Sigma focus on rendering with their latest mirrorless designs for the E-mount.

Another strength is color aberration correction. I struggled to find color fringing in any of my test images even under high contrast lighting. Slight traces of longitudinal CA are still present – but overall, the lens is well corrected for CA.

The aperture mechanism is equipped with seven ’rounded’ blades which prevents the lens from rendering defined sunstars at mid-range apertures. However, when stopped down to f/18-22, it still produces defined 14-point sunstars.
Rounded blades are very popular with AF lenses because it maintains circular specular highlights at smaller apertures. In the case of the Sigma 45/2.8, bokeh is still circular at f/4.5. (This would not be possible if it was equipped with straight blades)

On the negative side, flare resistance is average with good retention of contrast while ghosting is visible under backlit situations. AF is a mix bag. It’s fast and quiet but there are issues with phase detection (AF-C). It consistently back-focuses and hopefully this is an easy firmware fix for Sigma. AF works great in AF-S mode (contrast-detection). The lens is not equipped with a floating element system so expect image degradation at close distance.

For those looking for a light and compact walk-around AF lens with superb rendering and color correction, the new Sigma 45/2.8 Contemporary may be what you’re waiting for.

New Sigma FE lenses:
Sigma 35mm f/1.2 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.
Sigma 14-24mm f/2.8 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.
Sigma 45mm f/2.8 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.

ePhotozine verdict:

Some lenses are great, some lenses feel great and really gel with the user, some are great and really clunky to use. The new Tamron 17-28mm f/2.8 Di III RXD performs superbly, feels fantastic to use and is a very reasonable price as well. It’s light, efficient, moisture resistant and seems to tick all the boxes. This one easily makes it into the hallowed ranks of an Editor’s Choice.

Tamron 17-28mm f/2.8 FE preorders:
In the USA at BHphoto, Amazon, FocusCamera, BuyDig and Adorama.
In Europe it’s available at Amazon DE, Calumet DE, WexUK, Park UK, Amazon IT, Amazon FR, Amazon ES, CameraTools NL.

And here is David Oastlers take on the new lens:

And here one from Dustin Abbott:

And one from Precision Camera:

What you see on top is the Sony A7r modified in a way to look like a sort of Leica M camera :)

You can see a tons of pictures of the process on Weibo.com. Here are just a few of them where you can see the single modifications:

First they removed the plastic cover and than the top EVF:

The Sony TOP plate got removed with a Leica TOP plate from an older camera:

Than they removed the Alpha Logo and replaced it with the Leica Logo:

And here is the final product:

ePhotozine reviewed the new Samyang AF 45mm f/1.8 FE lens and concludes:

With a high level of performance and a pleasing character, the Samyang AF 45mm f/1.8 FE lens has plenty of potential to become a favourite. There are some parameters that may need some additional correction in software, not really an issue as the solutions are there. It is light and compact and generally just delivers the goods in a simple, discrete package. When used for street photography, it can be an advantage to use an unobtrusive lens.

There is some flare and there is no weather sealing, so these are a couple of disadvantages, but to be absolutely fair, the price tag is a very attractive one and generally, the Samyang AF 45mm f/1.8 FE lens is a delight to use. Highly recommended.

Marc Alhadeff posted an even way more detailed review:

Everything is not perfect but the lens scores very well on all the main points : very good to excellent sharpness, very good color rendition, beautiful blurry background , good bokeh balls wide open, efficient AF, small/light/cheap on a full frame mirrorless

Allan Weitz also tested the lens and writes:

If you’re looking for an extremely small and extremely lightweight wide-aperture normal lens that is a piece of cake to tote around all day and won’t break your wallet, by all means take a closer look at this lens.

You can get the lens now at BHphoto, Amazon, Adorama. Amazon DE, Amazon UK, Amazon FR, Amazon IT, Amazon ES.

Samyang AF 45mm F1.8: First Look | 4K

Sony A7rIV and new accessories:
Sony A7rIV in USA/CA at BHphoto, Adorama, FocusCamera, Amazon, BuyDig, Henrys.
Sony A7rIV in EU at Calumet DE, ParkUK, WexUK, Calumet NL.
Sony A7rIV in Asia at Sony Japan. Sony Australia.
Sony VG-C4EM grip in USA at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, ParkUK, WexUK.
ECM-B1M Digital Audio Shotgun Microphone at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, Park UK.
XLR-K3M Mic at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, Park UK.

Comprehensive first impressions video on the a7R IV from a wildlife & nature photographer (Juan Pons).

AFTER the Sony a7R IV: Sony ECM-B1M vs. RODE Wireless GO:

Dpreview added the Fuji GFX100 image files on their Studio Test Scene.

Here see a small crop comparison between the GFX100 files produced with the new Sony 102MP sensor and the Sony A7rIII. The difference is obviously big:

And here you can see a comparison with the A7rIII files in Pixel Shift mode:

Will be interesting to see how good the new A7rIV pixel shift mode will perform when compared with the GFX100.