For skywatchers like me, binoculars are as much a part of life as a telescope. I can take my 10x50 binoculars anywhere, and it’s through them that I know the sky best. But hand-held binoculars have one huge problem. They jiggle. You can’t see nearly as much in a jiggling view as in a still one.

Putting the binoculars on a tripod doesn’t help if you want to look much above horizontal. Special parallelogram-type binocular mounts let you aim all over the sky, but their bulk (and sometimes poor design) work against binocular observing’s handy, quick-look appeal. The modern breakthrough solution is the image-stabilized binocular, which uses electromechanical magic to calm the jittering with the push of a button. But it doesn’t come cheap. The runaway market leaders are the Canon IS series of imaged-stabilized binos, but the 15x50s that I lust for approach $1,000. Ouch!

However, I’ve discovered that you can add image stabilization to ordinary binoculars for practically nothing, with scrap wood and less than an evening’s work.

Beating the Binocular Jitters

Let’s consider the problem. Hand-held binoculars can move in six degrees of freedom (motion in all three dimensions, and rotation in all three dimensions). But only two of these actually cause the image to move: rotation of the binoculars around the axes oriented left-right and up-down. A sailor or airplane pilot would call these motions "pitch" and "yaw." Stabilizing the view means increasing the binoculars’ moment of inertia — resistance to rotation — around these two axes.

To achieve this, I first tried attaching my binoculars to a big, vertical plus-sign made of wood with weights on the four ends. This certainly helped, but it was awkward. I next tried a big wooden T, which had better balance but didn’t steady the view as much as I hoped. The most efficient design, I realized, would be a single rigid stalk extending straight in front of or behind the binoculars. But if it was in front, the balance would be awful, and if it was behind, my head would be in the way.

At this point my friend Eric Johansson of the Amateur Telescope Makers of Boston had a brainstorm: make a long, rectangular frame extending front and back with your head between the sides. Pictured above is my final result: a frame 5 feet long, with a heavier piece of wood in back to increase the moment of inertia. The binoculars ride on a tiltable cross-piece positioned so that the frame balances on the shoulders. I call it my Image-Stabilizing Frame.

It works! When my 10x50s are attached to it (either with a bungee cord as shown below, or with a ¼-20 bolt into the binoculars’ tripod socket), the jiggles are greatly reduced. I can see much more, yet still have total, hand-held freedom of movement to aim anywhere high or low.

Construction Points

My frame is made with two 5-foot lengths of 1-by-2 pine and cross members at the ends. How long should yours be? A short frame is less awkward to transport, but the longer it is, the steadier the views. Five feet was my tradeoff between convenience (to fit in my small car) and good stabilization. The two long sides of the frame are held apart by an 8-inch-long piece of 1-by-2 in the front and 2-by-6 in the back. The rear piece also functions as a counterweight.

The binoculars sit on a pivoting crosspiece consisting of another piece of 2-by-6 with a vertical slat screwed to its front, as shown. Make this assembly, attach your binoculars to it, then slide it back and forth in the frame to find where the frame balances on your shoulders with the eyepieces comfortably at your eyes. (You can hold the crosspiece to the frame temporarily with string or rubber bands while you make this adjustment.) I found that the frame handles best if it’s balanced to be just a little back-heavy.

Attach the crosspiece to the frame with a single screw on each side. The screw should go into the 2-by-6 close to its bottom, as shown. The vertical slat now serves as a handle to let you pivot the binoculars up and down a bit to position the eyepieces most comfortably to your eyes for any viewing angle. For proper pivoting, drill holes through the sides of the frame big enough for the screws to slide through freely; the screws should bite into the crosspiece only. I put a split-ring spring washer under the screw head on each side to make it easy to adjust the pivot-friction by tightening or loosening the screws.

Brave New Views

With my 10x50s mounted to the Image-Stabilizing Frame, I can see the galaxies M81 and M82 in Ursa Major for the first time through my suburban sky. All four of Jupiter’s moons are much easier to see and hold, and I even glimpsed Saturn’s moon Titan (with difficulty) for the first time in binoculars. I can easily split once-frustrating double stars, such as the 8th-magnitude pair Burnham 536 centered in the Pleiades, and resolve vague open clusters into swarms of points. Hundreds of formerly “telescopic” features hold steady on the Moon.

Testing showed that with the frame, I can see objects 0.5 magnitude fainter than with the same binoculars hand-held. This means that on average, twice as many astronomical objects of every type are within reach. (If you do the math, it turns out that seeing 0.5 magnitude deeper just about doubles the volume of space that you examine for objects of a given luminosity.)

Going Steadier

Nevertheless, some wavering of the image remained — and I wanted to get rid of it totally. Experiments revealed a law of diminishing returns: even a big, awkward frame nearly 8 feet long with barbell weights on the ends left some residual wavering.

The simple solution, I found, is to have something behind you, such as a wall, post, or car, that you can touch the back of the frame against once you've located your target. For this purpose, I stuck a pipe meant to support a bird feeder in the middle of my lawn. Merely backing up slightly and pressing the rear of the frame to the pipe makes the stars hold still! Using the Image-Stabilizing Frame this way increases the reach of my binoculars by about another 0.3 magnitude (increasing the number of observable objects by another 50%), makes Titan plain as day, and even begins to resolve the Trapezium multiple star in the Orion Nebula!

Nowadays I leave my 10x50s on the frame all the time. It stands by the door ready for a moment’s use. Okay, it won’t fit in a backpack. But it didn’t cost $1,000, and it doesn’t eat batteries.

Try making one for yourself, and see how much better a stabilized view really is.

Alan MacRobert, a Sky & Telescope senior editor, is proud of his geekitude and thinks do-it-yourselfing builds character.