Whatever possessed me to buy a camera where you can accidentally get your knuckles into shot? Or I thought I could, even though I haven’t done it yet. The temptation was the 120 degree field of view and the distortions you can get because the lens swings in an arc. I’m a sucker for odd.

So the basics are that it swings the lens in an arc and projects the image through a moving slot onto a curved film plane. In action it scans a narrow strip of light across the film. There are two swing speeds for the lens and a set of different slot widths for the scan. Together these give you a range of shutter speeds. Not a full set, as the two ranges don’t quite meet.

Because the lens effectively turns its head, straight lines across the frame appear to recede at the sides. Keep the camera level and the horizon will divide the frame across the centre. Tilt the camera and it bends from bowl to hill. There is a bubble level in the viewfinder and on the top of the camera to help.

The basic specs are that this camera uses a 28mm lens set at a fixed focus distance. This is fine, as the depth of field covers just about everything. For those of us shooting mono or infrared the lens can take clip on filters which can be fitted part-way through winding the camera, when the lens is midway through swinging back to its starting position. The camera comes with three filters, stored in the clip-on handle. These are a yellow, a UV and a neutral density one. The ND filter is handy because you have a limited range of shutter speeds. I took the plain UV one apart on mine and replaced it with a visually-opaque IR filter. Because the lens swings across a curved film plane it doesn’t vignette at the sides like a fixed wide-angle lens might.
The frame size is the normal 35mm film height (24mm) but as wide as a medium format negative at 58mm giving you a 2•5:1 panoramic format. The 58mm width means it can be scanned or printed from anything that can handle a 6×6 film frame. To be able to scan the film on 35mm kit I scan each frame in two pieces, then combine them. You will get around 22 shots on a 36 exposure film.
The camera looks like a fragile plastic fantastic, but I believe it’s actually a cosmetic plastic shell over a metal chassis. I’d still avoid dropping it though.
The camera can be awkward to load – the film has to follow a curved path so it needs more than the usual guidance. The advice is to put the film behind everything: it goes behind every roller and guide you can see.

What got me thinking though, and the reason I bought it in the first place, is the potential of that swinging lens. It swings left to right, so a fast-moving subject also moving left to right ought to be stretched. Moving right to left it ought to be compressed. If I stand on a bend and photograph the traffic it should also do odd things with the shape of the corner. And I wonder what would happen if I panned the camera to follow a passing subject? There is also the potential to photograph a group of people arranged in an arc in front of the camera. The picture should look as though they stood in a straight line, but all facing the camera.

In use the camera is awkward to hold. The shutter release is set back, so your trigger finger is not in the usual position. It also takes a firm press to fire the shutter. The clip-on handgrip is very useful for keeping your fingers out of the frame, for aligning the camera and for allowing your right hand to take a loose grip in order to reach the shutter release. I’ve used it plenty of times without the grip though, as it makes the camera easier to carry.

You will spend a bit of time trying to get the bubble level in the viewfinder centered. The viewfinder shows the field of view of the lens pretty well but not the distortions it produces. When you do press the shutter you get an extended mechanical whoosh as the lens drum spins. It’s unusual and distinctive.

It’s a good idea to keep this camera in its case or well protected when you are not using it. If a bit of grit gets into the swing mechanism you will get vertical bright lines appearing in the frame where the lens slows-down briefly. If you are buying one second-hand, see if you can get a recent picture taken with it. Streaks mean grit.

But, for all its awkward handling, this camera produces unique results. There are very few swing-lens cameras, and this one is probably the most accessible and cheapest way into the world of swing.
Alfred Klomp has also written about the Horizon camera in far more detail than me.