Parallax?

[krap101]

I know one kind of parallax is when you move your head, the dot targets to aim at something else, and parallax free or low parallax is when the dot moves to try to compensate for the head movement.. But i read about something about the more forward the scope is, the less parallax there is. i remember reading a detailed site describing these two, but can someone help me out with the 2nd parallax. (might be the same thing) but it was something about when the scope is more forward, the x becomes flatter and there is less parallax?

[Kos-Mos]

can you be less precise?

[Styrak]

He apparently no speaka the englisha very well.

[krap101]

I was kinda mumbling, and not really knowing where i was going. I'll try to find the site i was referring to, but it might be a little hard, because i dont remember what i searched..

[surebet]

I think the question was more or less this:

"If I mount my scope as far as I can to the forward end of the gun, will it help?"

[ancorp]

Most scopes have quite a limited eye relief. So it will make everything worse, IMO.

[krap101]

i dont know if its true, since i've only read it on one site so far, but it says there are two types of parallax, one is when you move your head the target changes. the site said the other type of parallax is the more forward the scope is, the more accurate the gun is. They used the example of an x, and the more forward the scope is, the flatter the x is and the more accurate it is..

[ancorp]

Dont you think that if moving a scope forward would "make the gun more accurate", then all the snipers in the world would use the forward mounted scout setup?

[Kos-Mos]

I think I got it.

When you move your head from shot to shot, there will be a difference in position since the crosshair is almost never directly in the optical center of the lenses.

Moving the scope foward would theorically REDUCE this effect because the angle at which the light will come in is less.

Problem is that every scope as a specific distance from the eye where field of view is optimal. That is the "perfect" distance to aim.

Only GOOD solution is to adjust your cheek rest carefully, and take a good aiming habit. Just come to the same position everytime.

[Black208]

I think he wanted an answer for why it would be better to mount a scope foward (lets assume in this case a red dot sight with unlimited eye relief, since you wouldnt mount a "sniper" scope on your handguard.)

if the following is true:

Originally Posted by Kos-Mos

Moving the scope foward would theorically REDUCE this effect(parallax) because the angle at which the light will come in is less.

than i guess it answers his question. (i still dont understand that explaination.. lol..)

[ILLusion]

I think the answer to "why" is pretty simple:

Close your weak eye and holding a pen with the tip pointing up, place the tip in the centre of your view, right in front of your eye. Let's say 1" away from your eye so that you don't poke your eye out.

Now move the pen to the side, let's say 5mm. Keeping your vision on something in the distance (the computer monitor you're reading this on, for example), note where the pen moved relative to your vision and the screen. For me, the pen started in the middle of the monitor, but after moving it only 5mm to the right, the pen was beyond the far right edge of my monitor. Move the pen tip back to the middle of your view so that it's back in the middle of the monitor again.

Now, while keeping the pen tip pointed upwards, extend your arm all the way out while keeping the pen tip in the middle of your field of view. Again, note where the pen tip is, relative to the monitor (we'll say the middle again) and move the pen tip to the side again, by the same amount you moved it before - 5mm. Note how little distance you've now covered? For me, I could barely get the tip past one word on my screen.




The other question that needs answering is "why don't all operators mount their RDS on the front of their outer barrel?" comes down to practicality and two main reasons IMHO:

1) Having the optics set further up on the end of the barrel makes the gun much more front-heavy, slowing down reaction time and initial shot readiness. Although having a heavy front-end gun makes the gun less susceptible to barrel climb, getting the front end steady for a shot can be an issue if the front is too heavy

2) Having the optics set further away from your eye reduces your field of view through the optics. Even with a tiny 20mm RDS, if it's set close to your eye, you can move your head around a significant distance and you'll still be able to view the dot inside the sight. However, if you set the optics at the very front of the gun, the slightest movement of your head can lose the dot, even with a massive 50mm red dot sight. Think back to my pen & monitor analogy.

In the end, it comes down to operator preference, finding that middle-ground between practicality, speed and accuracy.

[krap101]

great example. it really makes sense now .

[TokyoSeven]

Holy crap people actually aim when they shoot?Ah man I gotta get on this bandwagon.

[Dark-Angel]

aiming saves you ammo

[kalnaren]

Scopes in airsoft are generally better for seeing where your shots deviate and to correct accordingly rather than to "snipe" or get the target right in the crosshairs IMO