Vortex Diamondback field of vision?

[ajd3530]

I am shopping for a scope for a new rifle. I intend on using it mostly for still hunting thick woods on ridges and in the hollows, so I am looking at a 2-7 power scope. The finalists are either the Burris Fullfield, or the Vortex Diamondback.

Since I know I may have to take a rather close, rather quick shot, good field of vision is something that's important to me. The Fullfield has a field of vision of 45' at 100 yards at x2 power, which translates into roughly 11' at 25 yards. The Diamondback has a field of vision of about 64' at 100 yards on x2, or 16' at 25 yards. Quite a difference. I was just curious if anyone could break this down as to how the Vortex, with roughly the same dimensions as the Burris, is able to provide a much larger field of vision.

Thanks!

 

[Axis II]

could be the glass and size of the scope.

 

[Charles S]

The Fullfield has a field of vision of 45' at 100 yards at x2 power, which translates into roughly 11' at 25 yards. The Diamondback has a field of vision of about 64' at 100 yards on x2, or 16' at 25 yards. Quite a difference. I was just curious if anyone could break this down as to how the Vortex, with roughly the same dimensions as the Burris, is able to provide a much larger field of vision.

I am not an optics expert, but have been doing a lot of learning recently secondary to a renewed interest in rifle shooting.

I have not done the research, and do not know the technical specs of the two scope you mention. I am sure both are great glass. I have both Burris and Vortex optics.

To answer your question. 2 is rarely 2 and 7 is rarely 7. The 2 generally represents, for most manufactures, the closes round number to the lower power of the scope and 7 is the closest number to the larger power. I would bet the Vortex optic is lower in it's true power than the Burris.

A good example. The Leupold VX2 3-9 and VX3 2.5-8 have almost the same field of view in the lower and higher power, but one is 2.5 vs 3 and one is 8 vs 9. The numbers are just round numbers. I am sure there are some other factors as well.

 

[Haxby]

The numbers could very well be correct. Two scopes the same size and in the same price range can have different focal lengths, field stops, eyepiece designs, and eye relief.
The Burris design gives up some FOV, but might have less edge distortion at low magnification, and longer eye relief.