Field of view (FOV) is an important consideration when buying FPV goggles, but FOV is not something easily comprehensible. That’s why I created this tool to help you compare screen size of goggles with different FOV side by side.
FPV Goggles FOV Comparison Tool
Here’s the tool: https://oscarliang.com/js/fpvgogglefov.html
In this post, I will try to explain how FOV affects screen size in case you are interested.
What does FOV mean to FPV Goggles?
FOV stands for field of view, it’s a measurement of how big the screen appears to be when you are watching inside the goggles.
FPV Goggles manufacturers almost always provide FOV in the specs. It’s normally the diagonal field of view, which is the distance between the two diagonal corners of the projected image.
However, FOV is a degree, and it doesn’t make much sense to most of us. In order to compare goggles of different FOV, we can convert it to relative projected screen size, which we can calculate if we know the FOV and aspect ratio.
The picture below explains the steps and formulae that solve this problem.
I am quite proud of this tool as it gives us a way to visualize how big of an image we are getting in comparison to another goggles.
FOV is NOT Everything
For me, the minimum FOV of a pair of goggles is 30 degrees, anything smaller is really hard to see the image clearly. After trying so many different goggles, you might be surprised to find out my preference actually have an upper limit too.
Some people prefer larger FOV because it’s more immersive. However some prefer smaller FOV because they don’t need to move their eyeballs as much to see the OSD at the corners, and it’s less likely to have blurry edges.
For me 40-50 degree is the perfect range, but of course this is just a personal preference.
There are also 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.
- Apr 2018 – created tool
- Feb 2021 – updated list of goggles