We all know bigger FOV gives you “bigger screens”, but how much bigger? In this short post we are going to find out. I also made a handy tool to let you quickly compare the FOV between two sets of goggles side by side. It’s scary what a strong cup of coffee can do to you :D
FPV Goggles FOV Comparison Tool
Check out the tool here :) https://oscarliang.com/js/fpvgogglefov.html
The following explains how the tool works.
What does FOV mean to FPV Goggles?
FOV stands for field of view. The spec provided by FPV Goggles manufacturers usually includes diagonal FOV, which is the distance between the two diagonal corners of the projected image.
In order to compare different goggles, we need to know the relative projected image size, which we can work out from FOV and aspect ratio.
It’s hard to visualize what sort of image size we are dealing with when only talking about FOV. I think this tool is really powerful in giving people a better understanding of how FOV affects image size.
One interesting thing i notice is how much smaller 16:9 appears compared to 4:3 even when they have similar FOV :)
Conclusion – FOV is NOT Everything
There has to be a minimum FOV a goggle should have in order for us to see the image clearly. For me it’s 30 degrees.
Some people prefer larger FOV because it’s more immersive. However some prefer smaller FOV because they don’t need to move their eyes as much to see the OSD, and it’s less likely to have blurry edges.
Bigger isn’t always better, It’s just a personal preference.
And there are so many other factors that go into selecting the ideal FPV goggles. Make sure to check out my FPV Goggle Buyer’s guide to learn more.
Let me know if you have any comments or questions about this.