SONY

New Sony A7 V
Sony's new A7 V full-frame mirrorless camera has been getting rave reviews since it launched, however, it seems like third-party lens compatibility is one aspect that has been overlooked, as was recently discovered by one photographer's review of the premium hybrid mirrorless camera.
The Sony a7 V is an enthusiast-tier camera with a new, full frame, 33MP 'partially stacked' CMOS sensor, with a focus on high burst rates, capable autofocus and a complete suite of video features.
Like its predecessor, the a7 V features a 33MP sensor, but with extra readout circuitry to improve readout speeds (which were one of the a7 IV's weak points). We've seen this "partially stacked" technology in 24MP cameras like the Nikon Z6III and Panasonic S1II, but here it's being applied to a higher-resolution sensor.
Sony says this allows the a7 V to achieve much higher burst rates than its predecessor – 30 fps, up from 10 – and to do so with a full 14-bit readout, rather than requiring Sony's destructively lossy Raw compression. The maximum e-shutter speed has been increased to 1/16000 sec, too. The company also promises it won't have the same dynamic range reduction we saw with the Z6III, where increased read noise was evident if you pushed the shadows in post. Though we'll have to see if these claims are borne out in testing.

The IBIS system has also been upgraded, now stabilizing the sensor by 7.5EV, up from 5.5EV with the a7 IV.
The Sony A7 V only recently launched, and so far the reviews have been quite positive, with many reviewers praising both the full-frame camera's photo and video performance. DPReview called it "a genuine hybrid priced for mortals," thanks to its impressive all-round abilities. However, a photography review by Kai W on YouTube has revealed that Sony may have implemented some firmware changes that make the A7 V a no-go for E-Mount users who rely on third-party lenses, which are often a whole lot cheaper than Sony's in-house designs.
Kai starts off his review with a lot of praise for the hybrid camera's speed, autofocus, and video performance, however, when it gets to around the 16:15 mark, Kai tests the A7 V with a third-party lens, problems started to crop up. When testing E-mount lenses from a variety of Chinese manufacturers, including popular brands, like Viltrox and Sirui, Kai found that the camera exhibited a variety of malfunctions, with all resulting in a failure to capture an image. It should be noted that this incompatibility appears limited to autofocusing lenses, which makes sense, because most non-AF lenses aren't electrically coupled in any meaningful way.
The Sony a7 V looks like a hugely capable all-rounder, promising high resolution for its class, paired with fast shooting, the latest AF features and the ability to shoot fast, smooth video. It represents an appreciable step forward for Sony shooters, and perhaps it needed to.

The a7 IV was the first mid-range full-frame camera to push beyond 24MP, but this somewhat undercut the video, where any gain in detail was offset by levels of rolling shutter higher than its preexisting rivals. And while, back in 2021, you could fairly confidently address the impossibly complex question: "which of these models has the best autofocus" with the simple answer: "the Sony," much has changed since then.
In the four years since its launch, the rival offerings from Canon and Nikon have caught up in term of generic subject tracking, and moved ahead in terms of the range of subjects they recognize. Both brands have also made big advances in video, offering faster speeds, smoother readout and Raw video capture. Canon's recent EOS R6 III finally matched the a7 IV's remaining standout quality: photo resolution.

There is speculation that the incompatibility with third-party lenses may be a result of pre-release firmware, however, the A7 V is already available in Europe, and there appears to be no firmware update available for the new hybrid camera. Sony also states on its website that "a software update may be required for some lenses," so it's entirely possible that the responsibility for the incompatibility lies with the lens manufacturers, although this disclaimer is only referencing the A7 V's new 60 fps continuous shooting mode. One could then argue that it likely would have been fairly straightforward for Sony to implement a system to detect whether a lens is compatible with the new system in order to warn the user and give them the option to drop to a slower shooting mode.
It's worth noting, though, that options such as open gate shooting, native resolution video and internal Raw capture that are becoming common elsewhere aren't present here. Maybe Sony (perhaps correctly) doesn't believe enough mid-market hybrid shooters are going to need these features, or perhaps they're being saved for a future FX series camera. Either way, it feels like the a7 IV story all over again, with the a7 V looking competent, rather than excellent for video.

The a7 V uses the same 3.69M dot viewfinder as its predecessor, with the optics giving 0.78x magnification. It gains a tilting cradle on which its slightly larger, fully articulated rear screen is mounted. This means it can be tilted up or down, close to the back of the camera for waist-level or overhead stills shooting as well as flipping out to the side for videos or selfies. The added movement also lets you move the screen away from the camera, reducing the risk of the screen fouling your cables when you flip it out. The new panel has around 2.1M dots, giving around a 1024 x 682px resolution.
The a7 V uses the same NP-FZ100 battery that the a7 series has used for several generations, now. It's a fairly substantial 16.4Wh unit that powers the camera to a rating of 750 shots per charge if you rely on the rear screen and 630 shots per charge if you use the viewfinder. These are both impressive figures for a camera in this class, especially given that the CIPA-defined tests tend to significantly underestimate the number of shots most people find they actually get. Everyone's usage differs, of course, but so long as you don't spend lots of your time reviewing the images you just shot, it's not unusual to get double the rated number of shots.
That's why I keep stressing the a7 V's appeal to existing Sony shooters, because while it looks to do pretty much everything very well, there's not a lot, beyond its impressive battery life, that you can point to that screams "it's better than its peers at..."
Maybe we're past the point at which each new camera reaches greater heights than the competition, but Sony's latest feels like a camera that clears the current bar, rather than raising it. The Sony a7 V looks like a hugely capable all-rounder, but that's likely to be more exciting to Sony users than to the wider market, because so do its peers.
When asked about the incompatibility, Sony stated that "we do not guarantee third-party lens compatibility," seemingly neither confirming nor denying intentional incompatibility.
mundophone



