Specifically an Orion 10x42 Monocular.

SO much more convenient than my binoculars - as in for sharing with people, and more...

One dial for focus, one "dial" for eye relief (for switching between eyeglass wearers and bare face).

None of telling people "First get your interpupilary distance dialed, then focus the left objective lens, then focus the right ocular", or the time hassle of it.

I passed that thing around among little kids today, they had no problem with it. Binoculars I wouldn't have even attempted it (for flying airplanes, static terrestrial viewing would be a different matter).

I also liked how I could have one eye free in case I lost track of fast moving planes, without having to move a binocular away.

Less than half the weight of an equivalent binocular, less than half the size (on a side note less than half the price too), case has belt loop so it's like it's "holstered" (try THAT with any equivalent size/spec binos...)

A bonus with the model I'm using - unlike most (maybe all?) binoculars this thing can focus on objects as close as 2 feet. I wasn't inside the actual airshow, I was just outside of the base around trees, plants, etc, and so in between acts I was looking at bugs and such like with a magnifying glass but a few feet away.

I ended up not even pulling my binoculars out of my backpack because of this thing. Great airshow accessory.

And the Blue Angels kicked ass!

Good idea, need to replace my Binocs after giving them to my son before moving. Could use something like that for sure.

I use a monocular exclusively. Not nearly as modern as yours, a late Soviet era Helios MP2 8x30 (right hand) model. It is still much easier to work with than a comparable binocular. Bought mostly because it was cheap (equivalent to around $10 iirc) and compact enough to go in a normal pocket.

Mine doesn't focus down as far. Minimum focal distance is around 7 ft, but it is possible to work with it at that distance, unlike a pair of binoculars which would be complicated by the second occular. It is after all little more than a slightly modified housing for a half of a binocular, so different, as opposed to more convenient use isn't anything I'd expect of it.

Wow that IS some old stuff, left or right handed models?

Yeah get a "straight tube", mine was only $60, so awesome...

What I was loving was the whole "grab it and look" aspect.

The thing was "holstered". Lighter than most handguns I'd imagine...

Even a set of binoculars on a "necklace" isn't this quick and easy, and for moving targets it's definitely superior (don't get me wrong, I still use binoculars and still plan to upgrade mine).

Just a really great airshow piece of kit...

Used to carry a compact set of binoculars in the car, recently I replaced them with a monocular, much more convenient and easier to carry with you.

Now, the night vision scope, that still takes up a fair bit of room.

I have a small one I carried kayak fishing that I like. Really compact, not very powerful, but as mentioned, very convenient and easy to carry around.

I'm more than happy with it. Aluminium body, and the same 'grip' housing you get on binoculars of the same type (Poros Prism). It apparently can also be found in a left hand model.

I find it more stable in the hand than a lighter plastic version which my brother has (unsure of the type, but it is a similar magnification and objective size, but in an inline package).