Total solar eclipses are special. Imagine a giant suspended rock in the sky (the Moon) that just so happens to perfectly block the view of a ball of plasma so large that it would take a jet airliner over 200 days to circumnavigate its equator (the Sun). There’s no such other relationship in the entire solar system, and so far, it looks just as rare in the few places we’ve been able to peer closely at in our Milky Way galaxy.

Over the centuries, cultures believed a variety of more fanciful reasons for the occurrence. Many believed the event was a terrifying beast that swallowed the sun in retaliation for someone’s wrongdoings, like the wolf Skoll in Norse mythology (how the Sun recovered after such a trauma remains unclear). Other cultures viewed the event much more positively, with some indigenous North American tribes seeing it as an opportunity for spiritual renewal.

“A total eclipse of the sun is the most magnificent natural spectacle that a human eye can ever witness… It is a drama which is provided absolutely free by nature.” – Helen Sawyer Hogg (American-Canadian astronomer)

Share your August 12 solar eclipse photos

ESA & NASA

If you happen to be in the path of totality for this year’s August 12 event, which basically means most of Spain (you lucky locals), we invite you to comment on this article with a photo of the eclipse and share your story on what brings you out to see it. If we get some interesting photos and stories, we’ll write up a spotlight article for them.

More fun eclipse facts

Fast-forward about half a billion years, and total solar eclipses will sadly no longer be possible. This is because the Moon’s orbit is slowly receding from Earth. The Moon crawls its way farther out at a speedy 3.8 centimeters a year. This doesn’t sound like a lot, but over a ‘measly’ million years, it’ll be nearly 4,000 kilometers farther away.

Traveling through time a bit further than that and you arrive in the year AD 600,002,026 (ie, 600 million years from now). The Sun’s brilliance will increasingly surround the Moon from that point forward, a little bit more each year that passes. Future Sun-gazers will see it as a “ring of fire” (the Sun isn’t actually a ball of fire, but calling it a “ring of plasma” just doesn’t roll off the tongue in the same way).

Just like those North American tribes, let’s look on the bright side. In a scant 50 billion years, the Moon will be free of Earth’s tyranny and roam the galaxy on its own – assuming the sun doesn’t intervene in about 5 billion years during its red giant phase. It’s a complicated relationship: the Earth, Moon and Sun.

So, with such limited time available before total solar eclipses become a distant memory, take those photos while you can!

To learn more about solar eclipses and how to best prepare for one, check out our article, How to safely photograph a solar eclipse (and why you might just watch it instead).

Blackmagic has released a firmware update that adds continuous phase-detect autofocus, complete with object tracking and face detection, to its full-frame Cinema Camera 6K. This makes the camera more competitive in an increasingly crowded landscape of video-centric cameras focused on owner-operators and creators.

When the $3000 Blackmagic Cinema Camera 6K launched, it could acquire focus on something in the center of the frame, but it was a one-time operation; it wasn’t able to keep the subject in focus as it or the camera moved. While this wouldn’t have been a deal-breaker for many users – as the “cinema” name implies, much of its target audience will be using manual-focus lenses with focus pulling equipment – it also narrowed the scope of what you could do with it. It would work fine for more careful, scripted shoots, but wasn’t really ideal for more run-and-gun productions.

BlackMagic

Now, though, the camera will be able to continuously focus on a human subject, tracking their face, or on a generic subject through object tracking. Blackmagic also isn’t making you completely give up control to use autofocus; the camera has settings to control how fast it transitions focus, and lets you pause autofocus by holding down a button. That way if your subject goes from moving to stationary, you can make sure the AF system isn’t going to pulse or try to focus on something else.

That last point, however, highlights a potential gap between the Cinema Camera 6K and other video-focused cameras, like the Sony FX3, Canon EOS R6 V and Nikon ZR. Those cameras use AF systems that are much more mature, so you don’t have to worry as much about managing them; you can just leave them on, and trust them to keep your subject in focus in most situations. While Blackmagic’s autofocus system has been out in public beta for around a year now, early adopters reported mixed results, and it’s still not as tried and tested as the others.

However, this full release is a starting point for the company’s autofocus ambitions and at least puts the Cinema Camera 6K in the conversation with those other cameras, giving people who need autofocus another option that has a robust set of features. It offers 6K open gate recording and internal Raw, full-size HDMI and mini-XLR connectors, a 5″ rear display and an optional detachable EVF. It also uses L-mount for lenses, which is relatively adaptable and has a growing selection of native options.

Hopefully now that the Cinema Camera 6K’s autofocus support has fully launched, we’ll see it come to more cameras in Blackmagic’s lineup. While not all of them will have the phase detection hardware on their sensors, the company promised it’d be coming for more, unspecified cameras when it initially announced the feature last year, and it’s currently available in beta for the Pyxis 6K.

The Blackmagic Camera 10.2.2 firmware that enables autofocus is available as a free download from the company’s website. It also adds support for Blackmagic’s cloud streaming system, 4-channel audio recording and up to 10 minutes of pre-recording, letting you save the moments before you press the record button.

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“I just wish someone would make a proper 6×7 digital camera.” It’s the logical endpoint of every discussion in which someone loftily dictates that modern digital medium format is somehow not “real” because it doesn’t follow the conventions of film photography. And I have to say, I just don’t understand it.

Is it nostalgia for a camera regretfully parted with, or a yearning for something we never got to have? That waist-level viewfinder experience that looked so cool when David Hemmings stood in for every ’60s British (male) celebrity photographer in Blow Up. Or, instead, memories of that family member with a lovingly assembled collection of Bronica or Hasselblad 6×6 gear?

I have to assume that it’s something like this, because it doesn’t make sense in reality. Unless a radically different (and much cheaper) sensor technology suddenly arrives, no one is going to make a new 6×7 system. Or 6×6. Or even 645.

The reason is twofold. The first is that it would be utterly unfeasible, economically. The second is that it would be completely unnecessary.

The economics don’t work, not even nearly

Film scales much more readily than semiconductor size: the cost of doubling the size of a piece of film is within the realms of double or triple. A single-digit multiple, anyway. Doubling the size of a sensor more than doubles the production cost. Doubling it again starts to look exponential. You can’t just pick an arbitrary size that film cameras used to use and say, “I want it that big.”

Phase One

The only modern 645 camera is the Phase 1 IQ4 150MP digital back. It costs around $50,000. Sony has just announced a movie camera with a similarly-sized chip. Its price hasn’t been made public, but it’s primarily going to be rented for use in productions with budgets that start with nine digits.

And that’s before you consider the fact that there aren’t huge caches of medium-format lenses that would shine under the scrutiny of high megapixel sensors, much less any financial motivation for any surviving company to support them. So on top of the fabulous cost of the sensor, you’d also need to fund the development of a whole new camera and lens system, to be amortized between an infinitesimal audience.

But beyond the economic impracticality, there’s a question of what you’d gain.

How much better do you need?

Yes, larger sensors can generally tolerate more light, per whole image, and hence deliver higher signal-to-noise ratios, meaning cleaner images with improved tonal quality. And, in principle, it should be easier to design a lens that resolves the higher resolution that a larger sensor could bring. These are exactly the reasons that medium-format film cameras continued to be valued after the arrival of the smaller “35mm” film format.

Richard Butler

But it’s worth recognizing that modern digital sensors outperform film by almost every metric. There’s a difference in the handling of highlights, but modern sensors deliver more detailed images with better tonal quality, even if you only consider shooting in good light. And they do so to the point that they challenge the quality of film at least one format larger. You can rival 645 film performance with a modern full-frame digital camera, if you expose it well, and if there’s any question about that, you can always move up to a 44x33mm digital camera.

The quality you can get from a 44×33 medium-format sensor is sensational, which rapidly diminishes the applications that require anything more. Which just makes the overwhelming additional costs that come with it much harder to justify.

If you need the very best image quality available, you can spend that $50,000 and buy a Phase One IQ4. And a bit more on lenses.

But until you’ve bitten that particular bullet and found the results lacking, it’s hard to argue that any company should sensibly try to embark on digital 6×7 for you. Because, seriously, what is it you’re really hoping to achieve?