Posted: 4/4/2006 6:34:33 AM EDT
I need some information from those of you in the know. I have always assumed that field of view meant the feet you could see from one side of you scope to the other at 100yds. like so. Is this correct? If that is correct and the fov is 5' at 100 yds would it be 10' at 200yds or is it exponential and be 15' tripling every 100yds(equation)? |
| It is linear. You are talking about only one dimension - diameter. For two-dimensional things like gravity, it decreases at the square of the distance. Or for something 3D like expanding gas, the pressure would decrease at the cube of the expansion distanace. If you double the diameter of a ball of air, the pressure would decrease 8 times. |
 How about is my illustration correct or not? Yes or NO would suffice! |
I don't know the exact definition of FOV. I was answering your second question. Angular size decreases linearly with distanace. Thanks for appreciating my taking the time to answer. 
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Sorry! I am just not interested in expanding gases in this question just distances. I apologize! |
Accepted. Sorry for the drawn-out answer. I tend to do that. |
Thanks for the help anyway Greenhorn! I did find it. Here it is if you wanted to know. Field of View (F.O.V.) The side-to-side measurement of the circular viewing field or subject area. It is defined by the width in feet or meters of the area visible at 100 yards or meters. A wide field of view makes it easier to spot game and track moving targets. Generally, the higher the magnification, the narrower the field of view. Sounds like I was right. |
Yes, it extrapolates linearly just like MOA. IOW, 5'@100yds, 10'@200yds, etc. |
Short version is that it means Field Of View, in the case of your diagram, it says that your field of view is 5 feet at 100 yards, meaning that the area visible in your scope at that range is a circle with a 5 foot diameter. |
+1, good info, particularly for a GD thread 
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So a FOV of 5' at 100yds would be 25'at 500yds? Sorry about the simpleton questions. |