Picture of The smallest monocular ever :)
This is a small monocular/instructable about my discovery, when playing with lenses. The dimension of this small monocular are about 15x10 mm ... but I'm not sure about the magnifying ratio. I would say something about 3-6 times (or maybe more).

Step 1: What do you need...

Picture of What do you need...
You need just 2 main items :

1. lens from the small SPY camera
2. lens from a (broken) green laser pointer.

Then you need :

3. something that would hold the lenses together in a fixed distance to get a sharp picture (in my case = washers)
4. glue gun
lemonie5 years ago
Did you hold it in place with your hand, or was there some "fix" to the camera? You've dramatically reduced the viewable image-size - do you think there's any way of improving it? I reckon you got 2X out of this? L
zholy (author)  lemonie5 years ago
The monocular was placed in 'helping hands' and I was trying to make the best picture with the N95 in my hands.
The viewable image size will be a little bit better, if you have a look through. When you use your eye, the viewable image will be 2-3 times bigger/wider.
And about the improvement - I'm not really sure. The reason why the image is so small = the small diameter of the SPY camera lens. Is something like 2mm. On normal monocular or binocular, the first lenses are about 20-70mm = more viewable image.
As you mentioned, the viewable image is not that big, but the monocular on its own has less then 15x10mm. It's something for something :)
lemonie zholy5 years ago
Thanks for the information, I guess you could make this into a wearable monocular? L
zholy (author)  lemonie5 years ago
Oh ... and one more thing, about the improvement. According to my knowledge, there is a "general" rule : The bigger the lens, the bigger the viewable image/area ... and more light passing through = that you have nice image and can use that monocular in low light conditions. If you would take my monocular, then monocular with 20mm diameter and one with 70mm ... through my you would probably not see (in low light conditions), with the 20mm it would be a little bit brighter and with the 70mm just a little bit darker with comparison what you see with your eye. This is another factor that has an influence on the "working condition" of a mono/binocular in general.
zholy (author)  lemonie5 years ago
Of course, that was the main idea - to make a small portable monocular. But to be honest, I can't imagine a lot of people looking through this one. As I mentioned before, I think, the BEST use would be for spy cameras (I will try it in 2 weeks time and publish the results) or in a survival kit (where you have small compass, you can have a tiny monocular).