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Posted: 6/21/2013 8:18:43 AM EDT
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I like to use iron sights in my AR only, but my eyes are not what they used to be and now I have to "compensate" for that somehow. anybody has any experience using this? I think the concept works, is it worth it? Please give any feed back. thanks
Miso AR-15 |
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http://www.bjonessights.com/AR15.html I've heard these are nice, they were recommended to me by some service rifle shooters (of whom I trust their opinion greatly).
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That's a whole lot lighter than a flip up magnifier. The Bob Jones link is a LOT cheaper than the Miso. Lots of choices of power? as well.
How does it work? B/c if I can use the Aimpoint when stuff''s close, & I can use one of these "aspheric" lenses screwed into my rear sight for stuff that's a way's off, this is a clear win. 300 yrds is a long way for 40+ yr old eyes. |
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I've been using the Microsight in HP competition. I'm 60 years old, and with conventional rear sight apertures and lenses I could either see the target or I could see the front sight post. The Microsight displays both in focus simultaneously, but you lose approximately 50 percent of the incoming light. I had to ream out the aperture to 0.040.
See www.stallingsmachine.com. |
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And by using smaller apertures the eyesight will increase? .042 / .046 / .051 / .055 I would imagine it's like any other aperature in the rear peep sight; smaller aperature allows for more precision, but lets less light through. When I would dryfire in my basement to practice for highpower competition, I had to take the removeable aperature out of my rear sight or I wouldn't get enough light to my eye. I'd put it back in for a match. I didn't have a diopter in the aperature, but the same principles apply. |
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I've been using the Microsight in HP competition. I'm 60 years old, and with conventional rear sight apertures and lenses I could either see the target or I could see the front sight post. The Microsight displays both in focus simultaneously, but you lose approximately 50 percent of the incoming light. I had to ream out the aperture to 0.040. See www.stallingsmachine.com. The Original SR MicroSight Application: Users must have good natural or corrected distance vision ****** Pardon my ignorance, but what does that mean?? Stalling Machine Micro Sight |
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Netflix science fiction the principle of DIFFRACTION, not REFRACTION as do most lenses. The difference is that a refraction lens (which is what you have in your eyeglasses, your binoculars, a telescope, etc.) bends ALL of the light that passes through the lens. Diffraction works on the principle that light that encounters an edge (think a razor blade stood on end) is bent slightly as it passes the edge.
Now, for the human eye, any distance beyond about 20 feet is at infinity focus. When your eye focuses on something that is farther than that away, the focusing muscles - the ciliary muscles - are relaxed. Also the light reflected off of the distant object that actually enters the eye are travelling parallel with each other. (Other light that reflected off of the object are travelling in all sorts of other directions, but we are only concerned with the light that enters the eye.) However, for something closer than 20 feet, the ciliary muscles, arranged radially around the pupil of the eye, have to flex and pull the eye's lens into a "fatter" shape in order to refract the light passing through the lens so that it is in focus when it reaches the retina (the "screen" of nerve endings that line the rear of the inside of the eyeball. Young people's eyes can change focus so rapidly that it appears to them that a distant object, like a bullseye 200 yards away, as well as the front sight post, are in focus at the same time. Physically that's impossible, but the brain picks the in-focus target image and the in-focus front sight image, and pasts them together so that you perceive both to be in focus simultaneously. Doesn't work that way when you get older. As people age, and usually around 40 years old, the "focusing" lens in the front of the eye begins to harden, and the ciliary muscles have to work harder in order to pull the lens into shape for close-focusing. For most of life's tasks you get a perfectly adequate compensation for this by going to reading glasses or bifocal glasses. However, for shooting, this doesn't work (at least for iron sights). After all, you can't be bobbing you head up and down so that your eye looks through the center of your glasses to find the target, then through the bottom of your glasses to see the front sight post! So, we now have the MicroSight. The MicroSight was invented by a physicist at one of the big government research labs, David Crandall, who also happens to be a long range (1000 yards) target rifle shooter. He figured out how to arrange in a lens alternate opaque and transparent concentric rings, like the growth rings in a tree, so that light that encounters the lens that come from a distance, which are essentially parallel when they encounter the lens, pass through without being bent. However light reflected from the front sight of your rifle, which are travelling at an angle, like a sort of cone shape, encounter the opaque rings within the MicroSight lens, and are bent just enough that they exit the lens (and enter the eye) parallel as well. This means that both the target AND the front sight post appear in focus. The eye stays relaxed, at its "infinity" focus, the whole time. You do, however have to have either good natural distant vision, OR you have to a good prescription in a corrective lens that results in good distant vision, or else the image you see in the MicroSight will be out of focus. Also the MicroSight has to be perfectly aligned with the eye or the image gets sort of all pixilated (best way I can describe it). Stallings Machine, and others who sell the MicroSight, sell as alignment tool, consisting of a tube that threads into the AR15 rear sight leaf, that you look through and can tell if the tube is at an angle with respect to the eye. Then you simply bend the rear sight leaf, using the alignment tool as a lever, until it is. Note also that the MicroSight will only work on rifles where the rear sight moves up and down for elevation, and back and forth for windage, while staying at the same angle. An M1 or M14 sight can't be adapted to a MicroSight because of the way the rear sight adjusts for elevation on those rifles - it moves up and down in a arc. But for an old Service Rifle competitor, the MicroSight gets me back in the game. It's worth every bit of $140.00. |
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But for an od Service Rifle competitor, the MicroSight gets me back in the game. It's worth every bit of $140.00. And exactly what I am looking for. I thank you and rest of guys for input, I received a good education and appreciate it Will be ordering the MicroSight asap. |
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Make sure you buy the alignment tool also - it's only about $10.
You can call Stallings Machine, and you'll probably talk to Wayne Forshee. Ask him about the rear sight aperture that's on your rifle. It has to be drilled and tapped to the correct thread size for the MicroSight to screw in. I just bought a 1/4 minute aperture and screw from Wayne that I swapped on to my sight. Didn't cost much if I recall correctly. Now, I will caution you that the image that you will see is not as clear as what they show on their Web site. There is a sort of "disturbance in the force", as Darth Vader would say. But that might be just how my eye sees it. I have had others look through my sight and some are amazed at how well it works while one other guy said that he actually could see the diffraction rings. But I can only testify as to what I see, and I have no problem reading the number boards at 600 yards through my sight. |
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I'm 52. The front sight post on my M4gery gets kind of fuzzy now. I put an Aimpoint on it. I can still see the front sight on my A2 clearly. Yep! You're on the slippery slope! Your ciliary muscles can still pull that ol' lens into shape, but it just goes to show what a difference that few inches makes. A few years ago I could shoot my A2 irons just fine, but not any more. Just give it a year or two. Getting old ain't for the wimps! |
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