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Parrallax Free at 100 yds?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/18/2005 at 22:11
Brewdaddy View Drop Down
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Both Nikon Monarch and Zeiss Conquest claim on their brochure that they are Parrallax free at 100yds. I'm slowing starting to understand Parallax, but does these mean that anything sighted beyond 100 yrds, parrallax will not be an issue?

Zeiss even adds "Parrallax 30yds to infinity". Now I'm really confused!

 

Clarrify please, anybody!

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/19/2005 at 19:08
Brewdaddy View Drop Down
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Did I offend anyone, or doesn't anyone know the answer to this. Or is one of those questions that has been asked 100,000 times and everyon is tired of answering the same question and prefer that I look it up by searching?

 

Just wondering!

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/19/2005 at 21:25
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Brewdaddy, I am no expert on this question for there are many others on this forum more qualified than me, but I will take a shot at your Parrallax Question.  To keep it simple, parrallax is simply the apparent swift of an object against a background due to the change of the observers position.  A parrallax example which you could try is to take your rifle to the range, secure it and make it stationary with some sort of a rifle rest (vice or sandbags), and place the crosshairs on the target at least 100 yards.  Now without moving the rifle look through the scope at the target, move your head sidewides as you view the target, notice that the crosshairs move around on the target as you move your head, some scopes will much worse than others  When a manufacture states that a scope is parrallax-free at a 100 yards, than they have made the internal adjustment for 100 yards.  Henceforth, when you said Zeiss stated "Parrallax 30 yards to infinity", this is most likely relating to a scope that has an Adjustable Objective or in short AO.  By adjusting the objective your are suppose to dampen the parrallax effect at that given distance.  But, you might have to adjust the AO to 150 to dampen the effects parrallax at 100, or maybe 50.  The kicker is in my opinion no scope can be totally parrallax free at 100 yards, everybody has different eyes, and everybody has a different shooting posture.  In my opinion, the key to manage parrallax is to find a good scope that will hold zero, practice on a good cheek weld to the rifle stock, keep your head and eye at the same position when looking through the scope, and whether you stand hunt, stalk or do both you need to figure out a way on how to simulate and practice those different shooting situations. 

Hopefully, I Didn't Make Your Confusion Worse


LOL
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/20/2005 at 01:21
Brewdaddy View Drop Down
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Not at all, Thanks for clarifying it!

 

But,....

 

So, Can I assume that if I am shooting from 150-350 yrds. It will be necessary for me to ajust the AO to the distance being shot, prior to the shot and assuming the scope I buy is AO ajustable?

 

And, If the AO is adjusted correctly, will that eliminate parallax?

 

Thanks!

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/20/2005 at 12:06
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One thing that you want to be aware of is that parallax adjustment depends on environmental conditions: temperature and humidity.  If your scope is adjusted to be parallax free at 100yds at 75deg it does not mean that it will remain that way at a different temperature.  For the same reasons the AO scale is rather approximate as well. To know your parallax exactly you really have to check it at different environmental conditions.

 

Ilya

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/20/2005 at 23:19
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I just read on the Nikon web site. They claim that parallax will be eliminated once the AO is adjusted to the correct yardage.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2005 at 21:17
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That is absolutely correct.  The catch is that the scale of the Adjustment changes with different temperature and humidity.  I've checked it myself on several scopes.  You can always adjust it to get rid of parallax, but the setting is only repeatable at the same conditions.

Ilya
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