Geeze ... Don't move your head around in the eyebox

[Motorhead]

UNLESS you wish to see your eye IS NOT centered !!!

Now comedy aside this is just an FYI that honestly caught me off guard & I am well aware of trying to find a natural eye centering

This started with the mounting of a Tactical Green Laser on the SKOUT ( No not a Skout thread ) to give me a Zero range reference marker.
WHOA !!! yea a nice green dot at 38y superimposed over scopes X cross position ... THAT WAS UNTIL starting to move my head around

What had been parrilax focused to a crisp image within optics OBVIOUSLY was not parrilax free !!! Bobbing my head around within the eye boxes clear FOV edge to edge / top to bottom had the laser dot doing just off center orbits around the X of crosshairs. WTF !!!!

Only when taking the average in all directions did the dot sit centered with X.

Moral of the story if shooting for max precision, EYE POSITION MATTERS !!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[iAMzehTOASTY1]

Yes! that happened to me.
Now; laser is for hip shots under 50

 

[scubajeeper]

Under 50 yards and over 50 years old

 

[HogKiller]

I put a red dot with a magnifier on my close in gun 30 yards, spot on, 10 yards aim 3' HIGH, I'm going to set it for 15 yards or so and split the difference.

 

[Raider03]

Is this "effect" worse at higher magnification?

 

[FelixS]

Yep, I learned the eye position averaging when I first started shooting. I knew nothing of parallax and thought that was how it was done! I have no shame.

 

[MikeVV]

Yeah, even though this is one of the things that I test when I buy a dot sight or prism scope, that a "quality" sight/scope, should...be accurate with the target placed "anywhere" in the window, I always try to put the target in the center of the window as possible.
I also shoot both eyes open, dot, prism or full scope.

Mike

 

[Feinwerk]

Interesting test, thanks for sharing

 

[thane]

I have better success using a rigid eye cup setting eye distance until just a bit of vignetting occurs, then center the image.

This technique does not work well for me with Immersive prismatic scope that has a very wide range of view, hard to center.

 

[Motorhead]

Is this "effect" worse at higher magnification ?

Not sure of the totality of effect, but being the eye box shrinks as X power gets higher, you will need to be more centered ... So that said ???

 

[Motorhead]

Yeah, even though this is one of the things that I test when I buy a dot sight or prism scope, that a "quality" sight/scope, should...be accurate with the target placed "anywhere" in the window, I always try to put the target in the center of the window as possible.
I also shoot both eyes open, dot, prism or full scope.

Mike

Yea would like to think that to be the case ...
For those who might recognize the optic in picture, That is a SCHMIDT BENDER PMII which is a Tactical Sniper optic. Yea very much a quality optic !!

 

[Ranchibi]

Ha! Scott...and I thought I was the only one...

 

[RScott]

I was having an issue with my Sightron SIII 10-50x60 FT scope where it would go into focus at two slightly different distances, e.g., at 18 and 20 yards on the scope wheel. Sightron looked at it and informed me that it was parallax free at just one of those distances. After they returned the scope, I confirmed this using the eye movement technique. Their advice was to get to a parallax free position, then adjust the eyepiece diopter ring to get super crisp sighting at that point. This approach reduced the crispness of the image at the other, non-parallax free distance.

 

[Spartan]

Need to shoot with good glass. Not trying to be an ass, but it's the truth. People put $200 scopes on $2000 guns and wonder why they aren't getting the performance from the gun they thought they paid for

 

[Raider03]

Need to shoot with good glass. Not trying to be an ass, but it's the truth. People put $200 scopes on $2000 guns and wonder why they aren't getting the performance from the gun they thought they paid for

That scope on the SKOUT doesn't look like a low end scope? How much do you need to spend to guarantee this does happen...

 

[Spartan]

That scope on the SKOUT doesn't look like a low end scope?

I agree. And I did see in a later post that it's a Schmidt Bender, so very costly. But if it has that much parallax error, then perhaps there is a disparity between cost and quality here.

 

[boscoebrea]

better to learn about scopes and educate yourself first then while doing that save your money,

 

[Motorhead]

The scope does focus parrilax free, it at just 38 yards is at one edge of the sharp focus range as viewed when this test was done.
The threads origins was not a tutored conversation on "How too" but an observation made. So lets not get all worked up on whats not been said ...

Focusing any parrilax on any scope there is going to be some discrepancy on what is viewed as clear being dead nuts at the perfect parrilax setting.

These SB scopes parrilax very crisply and at @40 yards using a BIG field target type wheel ( 6-8" ) can discern by the yard w/o much effort.
On the stock knob which is @ 40mm unless you really stay in position and fiddle in small ( Seconds of degree rotations ) your close but seldom on the money either. This goes for most any scope with adjustable parrilax.

During this session viewing what i thought was focused to be parrilax free, The parrilax knob was turned In/Out a tad and did find a position where there was no error with moving around in the eye box. That was not the point of thread ... Point was pay attention to where your eye is within said eye box.
Assuming your parrilax free just because image is crisp & sharp will cause you grief .. that's the point

 

[JoePolanco]

That scope on the SKOUT doesn't look like a low end scope? How much do you need to spend to guarantee this does happen...

No amount of money will fix this. If I'm interpreting this correctly, this is an alignment issue. The laser dot and the scopes center should align perfectly regardless of eye position in the scopes eye box. If they don't, you're scope and site are either out of alignment, or your scopes parallax is improperly set.

 

[Motorhead]

No amount of money will fix this. If I'm interpreting this correctly, this is an alignment issue. The laser dot and the scopes center should align perfectly regardless of eye position in the scopes eye box. If they don't, you're scope and site are either out of alignment, or your scopes parallax is improperly set.

It is NOT possible for a laser to follow line of sight your viewing threw said optics.
Thus there will be angular indifference ( parrilax ) error present in all situations where optics adjustment will be required for correction.

Thus a PARALLAX set incorrectly issue & again the underling point to be made ..... just because image viewed in optics appears crisp & clear it has a likelihood to still be not perfectly corrected. Find your eye position center best you can.