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  #1  
Old 05-12-2019, 7:57 PM
skydive121 skydive121 is offline
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Default Field of View

A buddy of mine has a Vortex Razor HD 1-6 and I am running a Burris XTR II 1.5-8 optic.

These stats are according to each manufacturer's website (links copied below):

Razor FOV low - 115 feet
XTR FOV low - 65 feet


Razor FOV high - 20.5 feet
XTR FOV high - 13.3 feet

Razor - 30mm tube
XTR - 34mm tube

Razor - 24mm objective lens
XTR - 28mm objective lens

Why is the Razor nearly double FOV at the LOW setting? Is that what I get for paying twice as much $$ for the scope? I understand at the high end given the Burris sits at 8x versus the Razor 6x, but cannot wrap my head around the LOW end. Burris has a larger diameter tube and objective lens...

Is it as simple as that it is the way Vortex cuts and places their glass compared Burris?

Thanks for the help!!

https://vortexoptics.com/razor-hd-ge...iflescope.html

https://www.burrisoptics.com/scopes/...ope-1.5-8x28mm
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  #2  
Old 05-12-2019, 8:48 PM
Brush Guard Brush Guard is offline
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Intersecting question.

Looking at the Euro Opic website for comparison of other 1X6 Scopes I see the field of view at 1X varies

Trijicon 1-4X24 95 - 15.9 feet @ 100 yards
Trijicon 1x6 accupoint 117.5-18.8ft @ 100 yards
Kahles 1-6x24 138 feet at 100 yards

I did not look at other 1.5X scopes for comparison. Perhaps the 1.5 vs. 1X may account for some of the difference.

Maybe an advantage of a “true” 1X is that the field of view may not matter that much @ 1X when shooting with both eyes open.

Hopefully one of the glass gurus will chime in.
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  #3  
Old 05-12-2019, 9:48 PM
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HK Dave HK Dave is offline
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One is a 1x, the other is 1.5x low end.

So one is 50% smaller because it’s magnified 50%.
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  #4  
Old 05-13-2019, 7:02 AM
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OpticsPlanet OpticsPlanet is offline
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FoV is directly related to the design/construction of the eyepiece on a scope.

The difference in magnification inversely correlated to the FoV (more magnification, less FoV).

But even two scopes on the same magnification can have different FoV due to the design/construction of the eyepiece.

Larger tube diameter allows them to fit a larger erector system, more turret adjustment range, illumination, etc. Very little effect on light transmission or FoV.

Larger obj lens means the scope gathers more light but has very little if anything to do with determining FoV.

-Matt S.
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Old 05-13-2019, 7:49 AM
skydive121 skydive121 is offline
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So basically the two primary factors affecting FOV between the Burris and Vortex is:

1. Design
2. Magnification

Thanks for good summary!






Quote:
Originally Posted by OpticsPlanet View Post
FoV is directly related to the design/construction of the eyepiece on a scope.

The difference in magnification inversely correlated to the FoV (more magnification, less FoV).

But even two scopes on the same magnification can have different FoV due to the design/construction of the eyepiece.

-Matt S.
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  #6  
Old 05-13-2019, 8:27 AM
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tony270 tony270 is offline
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I don't know if the Field Of View is wider with a Second Focal Plane scope (Vortex Razor GenII 1-6X24), compared to that of a Dual Focal Plane Scope, the Burris?

https://www.burrisoptics.com/scopes/...ope-1.5-8x28mm
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