Viltrox 20mm f/1.8 at BHphoto, Amazon US, Amazon DE, Amazon UK, Amazon FR, Amazon ES, Amazon IT.

Opticallimits tested the Viltrox 20mm f/1.8 FE lens and concluded:

The Viltrox PFU RBMH 20mm f/1.8 ASPH enters a rather crowded space but it has a couple of differentiators that set it apart from the rest of the gang. There is, of course, the fast maximum aperture of f/1.8. The image quality is perfectly fine in the image center whereas the borders are quite soft. This may or may not be important depending on the target application. If you are into shallow depth-of-field photography, this isn’t really an issue for instance whereas for astro photography this isn’t ideal. If you stop down, the quality improves quite a bit and it’s really good at medium aperture settings. Lateral CAs are low and you don’t have to worry about image distortions either. The vignetting is on the high side though. The quality of the bokeh (out-of-focus blur) is pretty good for a lens in this class.

The build quality is excellent thanks to a tightly assembled, all-metal-construction. The price you have to pay for the solid body is the high weight and it isn’t a small lens either. Weather-sealing is not provided but that’s no surprise at this price point. If you are into videos, you will love the dampened control rings and yes, it has a step-less aperture ring – but no stepped mode. On the downside, it’s a fully manual lens with no coupling so if you can’t live without AF, a camera-controlled aperture and EXIF data, this lens is not for you. The Viltrox lens comes with two different lens hoods – one that is optimized for the job and a 2nd one that accepts conventional, albeit large filters (82mm). It’s a smart approach to have the choice without having to rely on aftermarket solutions. The quality of the lens cap could be better though.

Another differentiator is, of course, the price. At just under 400USD/EUR, it is not only very affordable, but it is also almost a steal considering the large aperture.

56mm f/1.4 at BHphoto, Adorama, Amazon. Amazon DE, Amazon UK, Amazon FR, Amazon IT, Amazon ES.

Opticallimits tested the Sigma 56mm f/1.4 DC DN and concluded

The Sigma 56mm f/1.4 DC DN Contemporary is an excellent example for how mirrorless lenses should be. It’s small and well built with a focus on the optical characteristics where it counts the most while compromising on secondary aspects that can be corrected without too many headaches. Namely the sharpness is very good at f/1.4 and downright superb between f/2 and f/8. The laternal CAs are very low. This can’t be said about the original distortion which is on the high side for a prime lens. Vignetting is also very pronounced at f/1.4. However, these two aspects are mostly corrected with image auto-correction either in-camera (with JPGs) or in RAW converters. A strength of the lens is the quality of the bokeh with nicely rendered out-of-focus highlights and a smooth blur in the focus transition zones. Bokeh fringing is present at large aperture but that’s rather normal for such a lens.

The overall build quality is very good. The lens body is made of metal and the big, rubberized focus ring is both smooth as well as very grippy. It also has basic sealing of some kind. On the downside, manual focusing is way too coarse to be useful at shorter focus distances. The AF is about average for a modern mirrorless lens – thus it’s quite fast, noiseless and accurate. You won’t use it for action photography though.

The sum of its qualities combined with the very reasonable price tag make the Sigma 56mm f/1.4 DC DN Contemporary an obvious choice in its class. Therefore – highly recommended!

56mm f/1.4 at BHphoto, Adorama, Amazon. Amazon DE, Amazon UK, Amazon FR, Amazon IT, Amazon ES.

Links: In USA at Amazon, Adorama, BHphoto and FocusCamera. In EU at Fotokoch. CalumetDE, WexUK. ParkcamerasUK.

Marc Alhadeff from SonyAlphaBlog concluded:

The Tamron 28-200mm F2.8-F5.6 Di III RXD is a high quality superzoom that will suit all people who want to travel light with only one zoom while keeping high quality
It will be at ease without any issues on 24 and 42Mpix, it even supports the 61Mpix in the majority of the cases
Of course like all superzoom there are compromise:

F5.6 at 200mm which makes it less suited for low light focusing at the long end
7 apertures blades and bokeh with onion rings
Little degradation of performance at 200mm
Some flare sensitivity

But overall images are rendered vary naturally, with very good colors, very nice blurry background and very good to excellent sharpness at all focal lengths. AF is fast and accurate , price is reasonable and lens stay compact
Compared to the Sony FE 24-240mm F3.5-F6.3, it is night and day , the Sony version was just decent on 24Mpix but was not at all at ease on 42Mpix and AF was not very good
Highly recommended if you one one unique travel zoom

Pro’s
Very good to excellent sharpness in the centre from 28 to 135mm
Reasonable price (870 euros)
Small and light for a all in one zoom
Very fast and accurate AF
Very low CA
Very short minimum focusing distance (19cm @28mm – 80cm @200mm)
Moderate vignetting and distorsion but will be corrected with a Lightroom lens profile soon

Average
Build quality : quite good but feel a bit plastic
Resistance to flare
AF at 200mm in low light due to F5.6 aperture
Sharpness at 200mm

Con’s
Corners sharpness
Only starts at 28mm
Bokeh balls shows onion rings and the 7 blades of the aperture

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And this is Dustin Abbotts take on the new lens:

Links: In USA at Amazon, Adorama, BHphoto and FocusCamera. In EU at Fotokoch. CalumetDE, WexUK. ParkcamerasUK.

Preorders:
In USA at Amazon. BHphoto. Adorama. FocusCamera.
In Europe at CalumetDE. WexUK.

Here is Lok’s take on the new lens:

And also Photographyblog posted their full lens review:

Despite offering a world-beating combination of F2.8 and 12-24mm, it’s still incredibly light, compact and most importantly very high quality indeed.

You can check out the complete specs sheet comparison between the new Canon EOS-R5 and Sony A7rIV on that BHphoto comparison tool.

Personally the one thing that stands out in favor of the Canon is the 8 stops stabilization. Otherwise the A7rIV holds up very well. And we still have to see if Canon image quality comes at least close ot the Sony.

Here comes the exact size comparison between the new Canon EOS-R5 and the Sony A7rIV via Apotelyt:

Preorders:
In USA at BHphoto. Adorama. FocusCamera.
In Europe at CalumetDE. WexUK.

Do you agree with Jordan on this? I also think 8K is a marketing win for the Canon EOS-R5 but from a professional and reasonable point of you it doens’t make sense at all to feature 8K.