Question regarding "Famous Maker" holodot(?) sight


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Deer Hunter
August 30, 2007, 11:57 PM
I was looking around the web for holo-dot sights to stick onto my S&W 625 (currently it has a Millet red-dot), and I came across these. Now I know they are not exactly the best quality around, but my Millet red-dot's actual dot moves around when I am at any kind of angle, so I guess I'm looking for a holo-dot that doesn't do that. I believe the term is "paralax free"? In any case, these caught my eye.

http://www.aimsurplus.com/acatalog/FM400.gif

The price is right, so anyone know if these sights would have a non-moving sight picture?

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browningguy
August 31, 2007, 12:59 AM
Famous Maker must be a new brand name:), I seriously doubt it will be better than a Millet.

Look at your red dot carefully aiming at a target, all of them seem to move the dot around the glass as you move your head. But my Pentax, as an example, keeps the dot on the target even when it appears to move around the glass.

jpwilly
August 31, 2007, 01:09 AM
The Baraska, as well as Pine Ridge Holographic Red Dot from Cabelas are basically that exact same sight. My Pine Ridge was returned when the glass fell loose from the recoil (or lack of recoil) of my AR-15 after half a magazine. You may not have any problems like that but that was my experiance. I replaced it with another Pine Ridge Red Dot model but one with a tube...and it promply fell apart after 90rnds then I returned it and got a TruGlo for the same money and it has worked flawlessly for a few hundred rounds now!

IMtheNRA
August 31, 2007, 02:17 AM
AIM had these in February of '05 (model #FM400). I'm amazed they're still on the market!

Trebor
August 31, 2007, 02:57 AM
my Millet red-dot's actual dot moves around when I am at any kind of angl

The dot is *supposed* to do that. As Browningguy said, the dot will always appear over the same point on the target as you move your head around. That means the dot *always* is showing you where the bullet will go (assuming it's sighted in) even though your head might not be in the "correct" position.

It's a feature, not a bug.

Dionysusigma
August 31, 2007, 03:43 AM
^^Heh.

Take any beholosighted rifle and put it in a gun vise or rest, taking care to aim at a fixed point any distance away. Move your head around while looking through the sight and not touching the rifle.

The dot shifts.

Every.

Single.

Time.

Yes, it looks like it's drifting around in the viewfinder, and it is, but the dot does not remain on the fixed point. The rifle's not moving, so the POA shouldn't change, but it does. This is the dreaded, and unavoidable, parallax.

Aimpoints, Docter, Trijicon Tri-Powers and Reflexes, and any other brand all do it. The ones that do it the least are EOTechs, but it still happens. That's one of the reasons that holosights are best left to CQB roles and not long-distance shooting.

I wouldn't believe it (nor want to), had I not done the above test several times with every single holosight I've come across, but I have, and it happens.

(Pre-empting any nay-sayers who might (and probably will) accuse me of parroting third-party info.)

Deer Hunter
August 31, 2007, 11:35 AM
I see. So what does it mean to be "paralax free"? I've heard that term be used around the forum. Plus I would think that the holo-dot retical wouldn't move so much compared to my red-dot.

The Millet is mounted on my S&W 625, by the way. I just wanted something that wouldn't be so shakey when looking through the reticle.

benEzra
August 31, 2007, 01:11 PM
It's generally set up to be parallax-free at a certain range.

You ARE looking at something distant, and not a wall 15 feet away, when noticing the parallax, yes?

My Kobra (Russian collimator sight) has some parallax if I am looking at something close, but no noticeable parallax when looking at something 50 yards away.

Deer Hunter
August 31, 2007, 06:35 PM
I'll have to break it out again to really see for sure (Pistol's back home and I'm in college). I was just wondering if because of the holodot sight design it would be less of a "wiggle" to it. I usually shoot at 25 feet with this gun.

sansone
August 31, 2007, 06:46 PM
I have yet to see one of these without parallax (movement in sight picture when shifting your head).. keep the Millett you got

Dionysusigma
September 2, 2007, 04:00 AM
It's generally set up to be parallax-free at a certain range.
Um... how? :scrutiny:

Parallax screws up everything, over every distance. There's no way it shifts 7 MOA at one distance, and then only 1/2 MOA at another. Violation of the laws of physics and such.

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