Convergence

Zach Horton

Tag: film

Introducing the Mercury: An Infinitely Extensible, Open Camera System

 

machining the Mercury prototype

Machining the original Mercury prototype

After over two years of development, I’m very excited to announce the debut of the Mercury, a fully modular, open, universal camera system. For years I’ve been tinkering with cameras, machining custom parts, modifying existing designs, and generally experimenting with the technical possibilities of still photography. Eventually, a “maker quest” took shape, for purely personal reasons: the fabrication of the perfect camera. For me, at the time, that meant a relatively small, compact, hand-holdable camera capable of shooting a full 6x9cm frame on 120 film. That’s standard medium format film, which has a fixed height of 60mm but no fixed width: it is up to the camera and lens system to determine how much width to use for each frame. Most common today is 645, which uses only 45mm of film width, utilizing it as the vertical dimension of the frame. Older but stouter cameras, such as the venerable Hasselblad, Pentacon 6 (about which I’ve written extensively here) utilize a square 6×6 (cm) frame. Some professional cameras from the end of the 20th century shoot even larger frames, 6×7, but are themselves so enormous and heavy that they are often referred to as “boat anchors” by photographers. I wanted to do 6×9, a format popularized by Kodak in the 1920s (for which they invented 120 roll film). 6×9 “folders” were popular through the 1940s as amateur cameras, before being replaced by the new flood of 35mm film cameras once film stock became “good enough” to shoot on such a small negative. Folders were very limited, with only one lens and an often awkward mechanism by which they would fold out and lock together into their final form when you wanted to shoot—a delicate state not conducive to protection or focus accuracy. I love these cameras, but they would not satisfy me: I wanted my camera to be able to take nearly any lens, and to be rugged.

The Mercury, in medium format film mode.

The Mercury, in medium format film mode.

Professional cameras that could shoot 6×9 were made by Graflex in the USA, Linhof in Germany, and Horseman in Japan, but their heyday was in the 1960s, and they mostly faded away after that. And most of these cameras were fairly large and heavy, invariably made of metal, and contained a lot of options and controls that, for me, added too much bulk. Plus, most of these cameras were too thick to take ultra wide, non-retrofocal lenses. These special lenses, for the ultimate in wide angle photography, require an extremely thin camera; they are made for so-called “technical cameras” that generally cost multiple thousands of dollars. So I set out to make my own. I machined various parts from various cameras, but to make everything fit together, I ended up having to 3D print a number of components. When I was done, I ended up with an awesome prototype, and a revelation: I could create a version of this camera entirely from plastic components and it would be far more flexible, extensible, and lighter, as well as sharable by a community of users. So I set out to make a fully modular, open camera system based upon standard components that anyone could modify, replace, and upgrade for new functionality.

medium format rear right

The Mercury, in medium format film mode, sporting a classic Horseman 6×9 roll film back.

Slowly, a system began to come together that was, I hoped, truly revolutionary. On one hand it was a camera that could do anything, theoretically: any module could be modified or replaced to allow compatibility with some past or future part that already existed (19th century lenses, 21st century digital backs, new and old instant film formats, Hasselblad film backs, etc.). This was truly a rhizomatic camera: it could connect anything to anything else. But it was, I felt, more than that: it was also a form of hardware development that was fundamentally anti-corporate. It was meant to follow an open source software model of open community development coupled with new distributed manufacturing techniques such as 3D printing and low-volume injection molding with innovative materials, and the collective potential of crowdfunding (Kickstarter, Indiegogo, etc.) and social media. This would be hardware development for the 21st century: distributed but centrally organized, driven by the very dynamics that make a community vibrant, without profit motive or exclusionary intellectual property (the double helix of contemporary capitalism). In short, the Mercury was a unique photographic tool, a platform for hardware development and creative experimentation, and a socially driven, user-innovator system with hardware, software, and social components inextricably linked.

The Mercury, in medium format film mode, sporting a Mercury modified Instax Mini back.

The Mercury, in medium format film mode, sporting a Mercury modified Instax Mini back.


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Along the way, I started working with Andrew Duerner, a robotics engineer in Goleta who is a true master of 3D design, printing, and assembly. He developed our breakthrough focusing helical unit, which takes nearly any lens and allows the user to focus it if, like view camera lenses originally made for bellows cameras, it lacks a built-in helical. For lenses that have a build in helical but lack an internal shutter (such as many medium format “system” lenses by Mamiya, Pentax, etc.), we have adapter kits that adapt the lens to a standard large format shutter (either the Ilex 4 or Copal 3), and then adapt that shutter to the camera, at the correct flange distance for that format.

The other members of the team include my dear friends Joe Babine (a veteran machist and master craftsman) and Alexandra Magearu, who has extensively tested, evaluated, and re-designed the camera’s ergonomics and aesthetics.

The Mercury, in Large Format (4x5 inch sheet film) mode.

The Mercury, in Large Format (4×5 inch sheet film) mode.

As I write this, we have one week left in our Kickstarter campaign. I do not yet know if the campaign will result in the project being funded or not. If it isn’t, we’ll reach out to users in other ways. If it is, we’ll be able to afford the tooling to create injection molds for the most common parts, which will bring the cost and manufacturing time down to the necessary level to make this system available to users on a significant scale, as well as optimizing the system itself so that each part is made in with the best method, imparting the optimal characteristics (surface finish, flatness, and strength for molded parts, flexibility and customizability for 3D printed parts).

Already, the Kickstarter campaign has been incredibly rewarding. I’ve received messages from photographers all over the world, with all sorts of wild use scenarios: adapting nineteenth century lenses for medium or large format, using their favorite lenses to shoot Instax, coupling non-Hasselblad lenses with Hasselblad backs, shooting high-end digital, etc. It has been incredibly rewarding to hear about all of the things folks want to (and will) do with the Mercury: this is what has made it truly open and universal.

The Kickstarter campaign can be viewed here. Your support is greatly appreciated!

A photograph taken with the Mercury on large format sheet film: Kodak Portra 400, with a vintage Kodak Ektar 127mm f/4.7 lens.

Media Archaeology: Olympus Pen F System

Pen FT with F. Zuiko 38mm f/1.8 lens, next to 35mm film cartridge for scale. Photograph by Zach Horton.

As the first post in an eventual series on old and innovative photographic ecosystems, I thought that I’d write about my favorite small camera. I promised in my inaugural post for this site that “convergence” would mean a convergence of many of my own interests and obsessions, and one of those includes a kind of media archaeology of photographic equipment. As will perhaps become more clear in later posts, one of the things that fascinates me about the technical aspects of photography is systematicity: how many components from the diverse worlds of optics, fine-tuned mechanics, chemistry, microelectronics, stabilization, and clockwork shutter mechanisms have to combine to control the transmission of light into an image in some persisting substratum.

Rome, Italy. Photographed with a Pen FT and 38mm lens on Ilford Delta 100 film by Zach Horton.

For that reason, we will be working our way up to the most versatile possible large format cameras, which are veritable technological ecosystems unto themselves. To begin with, however, I’m going to start small.

There are many sources for the history of the Pen series online, (this is my favorite) so I won’t spend much time there. Basically, camera designer Yoshihisa Maitani was the mastermind behind this series, which is extremely elegant in both aesthetics and function. The first couple of models were simple but tiny and elegant rangefinders. They were so successful, that Olympus handed Maitani a nearly impossible mandate: make a Single Lens Reflex (SLR) model of the Pen, with interchangeable lenses, keeping the same svelte body! SLRs tend to be significantly larger than rangefinders, as they require a large and complex mirror mechanism and pentaprism to direct the lens image to a viewfinder when not exposing an image (rangefinders use a simple viewing lens or window instead, making camera bodies smaller and lighter, but introducing potential focusing and composition [parallax] issues, and more restricted lens design). An SLR the size of a small rangefinder would be a coup indeed… and Maitani pulled it off! The Pen F model, released in 1963, unleashed the full versatility of an SLR, incorporating full manual controls and interchangeable lenses.

Pen FT, back.  Photograph by Zach Horton.

Pen FT, back. Photograph by Zach Horton.

Maitani made several innovations in order to realize this remarkable machine. The first was shared by the entire Pen line: he designed the camera to shoot a half-frame 35mm image. Thus the camera utilizes regular 35mm film, but exposes a frame only half the usual size, in a vertical orientation. This allows up to 72 images to be exposed on a standard “36 frame” roll! The film is fed through the camera horizontally, but the camera takes vertical images. This takes a bit of getting used to: in the camera’s horizontal position (the natural way to hold it), it takes a vertical image, and in a vertical orientation, it takes a horizontal image.

Garden in Rochester, New York. Photographed with a Pen FT and a 38mm lens on Kodak Ektar 100 film by Zach Horton.

Maitani’s second great innovation was to design a shutter and mirror based upon a rotating mechanism rather than a flip-up mirror and prism. Apparently, this took years of engineering to perfect. The result, however, was a svelte camera that looks every bit like a rangefinder, but is actually an SLR.

The Pen F was able to overcome the traditional limitations of an SLR by eliminating the bulky prism and mirror assembly, thus allowing the lenses to sit closer to the body (i.e., they have a shallower focal plane distance), and keeping both the body and lenses very small by specifying a half-frame format (which requires a smaller image circle, roughly equivalent to today’s common “APS-C” or “crop frame” digital sensors). The lenses for this camera are incredibly tiny and, well… cute, as well as extremely high quality. The Pen F was a high-end camera system.

Bamboo sculpture. Pen FT, 38mm lens, Kodak Tmax 100 film. By Zach Horton.

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And now, for the lovers of obsolete technological assemblages that learn to do new things (I’ll have far more to say on this in the future), a small twist: the primary disadvantage of the Pen F system in the 1960s, its reduced resolution, has been mitigated considerable in the twenty-first century. In a mostly digital world, film costs have skyrocketed, while its aesthetic and tactile qualities have never been more valued. Film grain technology was improving in the 1960s, but peaked in the 1990s for silver-based black and white emulsions as well as positive emulsions, and in the 2000s for color negative emulsions. The result is that current film stocks such as Fuji’s Velvia, Ilford’s Delta series, and Kodak’s Ektar, Tmax, and Portra lines, are extremely fine grained (due to the “T-grain” technologies used in their construction), and can easily produce gorgeous images on a half-frame format. (In standard developers using standard methods, there can still be a decent amount of grain, but not distracting amounts. Special developers and techniques can further reduce the grain, but this is outside of my interest.)

Horse in the Carpathian mountains, Transylvannia, Romania. Photographed with a Pen FT and 38mm lens on Ilford Delta 100 film by Zach Horton.

At the same time, given the expense of these gorgeous film stocks, all of those extra frames afforded by the half-frame Pen are quite welcome (far more so than in the 1960s, when film was a mass commodity), especially for street or travel photography, for which this camera is uniquely suited. So, for those who like to shoot “on-the-go,” and prefer film, this is a beautiful camera system. I have used it for a couple of stints of travel and have loved the experience as well as the results.

The Kodak factory in Rochester New York, still producing film in 2014.  Photographed on a Pen FT with 38mm lens on Kodak Ektar 100 film by Zach Horton.

Kodak factory in Rochester New York, 2014.  By Zach Horton.

This is one of the most pleasurable cameras I have ever used. It is a joy to hold in the hand, to have such a small lens and camera that can nevertheless do the full compliment of manual photography: manual shutter (in a fun dial on the front of the camera), manual aperture (in uniformly excellent manual aperture rings), depth of field preview, remote release, and timed release. The shutter button is a unique rectangle that sits flush with the top of the camera. The subtle snap that the circular mirror and shutter make when you take a photo is always satisfying.

Bran castle- front lantern

Entrance to Bran Castle, Vlad the Impaler’s old Transylvanian home, in 2014. Photograph by Zach Horton.

A camera of this size does come with a couple of downsides, however. The viewfinder is small and rather dim (a problem exacerbated on the FT model, which diverts some of the light to its built-in, but rarely useful light meter). It is a bit harder to focus as a result, though this is somewhat compensated by the increased depth of field of the smaller format. The top shutter speed is 500, rather than the more usual 1000. The FT model improved upon the original F by making it far easier to load film, changing the advance lever to a single-stroke design, and adding a built-in light meter. The first two improvements are very welcome, but the light meter, at least after all of these years, hasn’t held up well: it is often broken or wildly inaccurate, and requires the outlawed 625 mercury battery, or a sophisticated adapter. And even when it works perfectly, it is a pain in the ass: it reads out not actual f-stops, but only a proprietary numbering system that the user must then dial in on the lens’s aperture ring (the ring on each lens can be reversed to display either f-stops or these numbers). This is slow, confusing, and won’t work with third-party lenses. Most people (including myself) simply use an external meter, or, because this camera is best outdoors, simply estimate the proper f-stop using the “sunny 16” rule.

The Olympus Zuiko 38mm 1.8 is an excellent standard lens. I use it 90% of the time. I can also recommend both the 25mm f/4 and the 100mm f/3.5, both of which are fairly readily available and round out a great kit. Many more exotic lenses exist, but fetch very high prices on the secondhand market, and thus represent great value to the collector, but less so for users like myself. Adapters were made by Olympus at the time for lenses from most other systems. A current Chinese company makes high quality adapters for a few common lens systems today (Canon EOS, Nikon, etc.). I have a Canon EOS adapter that works beautifully, and allows me to round out my kit with the excellent, very small Takumar 55mm 1.8 (M42, with an adapter to EOS), which makes a great portrait length on the Pen. These adapters are expensive, but much less so than many native Pen lenses!

Pen with EOS adapter and FL 55mm f/1.2 lens (custom machined to EF mount).  Photograph by Zach Horton.

Pen FT with Canon EF lens adapter and Canon

Overall, this little camera is a marvel of design and engineering and an immense pleasure to use. Perhaps most interestingly, if paradoxically, its time has perhaps finally arrived.

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