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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/08/2008 at 18:11
Crotchity View Drop Down
Optics GrassHopper
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While looking around in the store I saw a scope with out a parallex adjustment. Now correct me if Im wrong but is the below scope parallex free all the way out to 1000 yards? And if so why arent all scopes like this?

 

IOR%202.5-10x42%20Tactical%2030mm%20Rifle%20Scope%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20

IOR 2.5-10x42 Tactical 30mm Rifle Scope

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Specifications
Weight (oz): 17


First Focal Plane Illuminated MP-8

Length (in): 13.5
Eye Relief (in): 3.5
Field of View @ 100yds (ft): 34 - 11.9
Exit Pupil (mm): 16.8 - 4.2
MOA: 1 Centimeter
Lens Coating: Fully Multi-Coated
Warranty: Limited Lifetime

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/08/2008 at 19:05
Mike McDonald View Drop Down
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Depends on how your statement is read.
 
The scope pictured is equipped with an adjustable parralax feature, which depending on your particular eyesight may or may not be able to be adjusted to a parallax free setting at a given range, up to and far past 1000 yards.
 
Scopes without an adjustable parallax might normally be set to be parallax free at 300 yards. 
 
As to why all scopes are not like that is that;
A.   It's not a requirement that every scope for every use have that adjustment
B.   It adds significant cost to the item


Edited by Mike McDonald - March/08/2008 at 19:07
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/08/2008 at 19:55
RifleDude View Drop Down
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That particular scope does not have parallax adjustment.  The 3rd knob on the opposite side from the windage turret is the illumination control rheostat.  That scope maxes out at 10X, and parallax error doesn't become super critical until the magnification gets above about 12X.  Most scopes with parallax adjustment have magnification beyond 12X on the upper end.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/08/2008 at 20:34
koshkin View Drop Down
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In reality, no scope is entirely parallax free, but in amany good scopes the error is so small, that it might not make a difference. Typically, most scopes of 10x and lower magnification do not have parallax adjustment.  The scope in the picture also has a reticle in the front focal plane, which helps with parallax as well.  If the magnification range is acceptable for your needs, I do not think parallax is going to give you any problems.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/08/2008 at 20:49
Mike McDonald View Drop Down
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One of the neat  things about the IOR 2.5-10 is that the power ring is tied to a parallax adjustment internal to the unit.  Focus that scope so the reticle is crisp then attempt to use it at 100 yards on 10x and you'll see what I mean.   I have one and love it.

I'm going to have to whole heartedly disagree about parallax being critical only when referenced to range or magnification setting. 

 Seen way too many guys with 10x scopes and no parallax bust shots easily made with a fully adjustable optic.  Get behind an MST 100 if you have the chance and see what 600 yards looks like with a scope set parallax free at 300 meters.  Repeatable head position becomes super critical with a non-adjustable unit.

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/09/2008 at 11:05
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That is a great scope it really has everything going for it.  I would certainly like to have one.
Sharp%20Shooter
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2008 at 22:25
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Optics GrassHopper
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The old USMC 10x unertl scopes had to be adjusted for parallax by using a spanner wrench on on the objective assembly.   Not saying thats the case for the scope you guys are talking about, just throwing it out there.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/13/2008 at 01:19
Ed Connelly View Drop Down
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Originally posted by Mike McDonald Mike McDonald wrote:

One of the neat  things about the IOR 2.5-10 is that the power ring is tied to a parallax adjustment internal to the unit.  Focus that scope so the reticle is crisp then attempt to use it at 100 yards on 10x and you'll see what I mean.   I have one and love it.

I'm going to have to whole heartedly disagree about parallax being critical only when referenced to range or magnification setting. 

 Seen way too many guys with 10x scopes and no parallax bust shots easily made with a fully adjustable optic.  Get behind an MST 100 if you have the chance and see what 600 yards looks like with a scope set parallax free at 300 meters.  Repeatable head position becomes super critical with a non-adjustable unit.

 

 
Is that power ring-parallax combination thing in the Hunting scopes, too...or just the Tactical IORs?                              --Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/13/2008 at 06:14
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It is a very good scope you need not worry about the parralax on that one.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/13/2008 at 06:53
Mike McDonald View Drop Down
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Ed,
the only model I could speak about is the 2.5-10 tactical. Haven't tried the hunting line.
 
At first I could'nt sort out why the image change, then started paying attention.  As the magnification is increased the parallax changes so you can have a parallax free setting at just about every range at some X setting.  The 10x setting seems right at about 975 yards, or a rough  900 meters.
 None of my other first or second plane variable scopes from any manufacturer  exhibit this trait.  I just thought it was pretty neat that someone would think to do that.
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