I’ve bough 3 cameras now, and for some reason they all seem to have half the field of view they advertise… And start from the center. Like if it’s supposed to be 110 degrees, it will be 55 degrees in the form of a right angle triangle with the left side limit being straight in front of the sensor…
What am I missing here?
Thanks
Can you provide some visual examples of what you’re seeing?
I made some doodles to help illustrate but I think I found a pattern.
So with longer cameras of this type
I do get the correct FOV as advertised so if I test it I get something like this
But with multiple square ones now from different vendors and with different lenses of this style
I get a strange half FOV like so
If you aim directly at something are you saying that literally only half the image is appearing? Is the other half of the image black, or is the image compressed at only half the image? What is the final resolution of the image?
Also, where are you seeing this? Is this in a particular application?
It’s not black, it’s just where the image ends period. But only with that style of module, so it probably just the wrong application and poorly defined specs. It was the same in any of multiple applications, I was just moving a pen in front of the camera until it appeared in view.
Sounds like either a driver issue or the camera is misreporting its capabilities. If all the modules you tried are sharing the same components I could see that resulting in the same symptoms.
Did you try the module on a different operating system?
Yes I have. Android and windows. It really seems like an optical alignment thing and either its poor design or its meant for something like a security camera where seeing a wall is pointless. Just typical misleading specs on an inexpensive product.
Interesting. What’s the captured resolution of the video?
These type of cameras are often used in hobby projects and I hadn’t seen mention of anything like that but now I’m going to start looking for it.
I’ll try to set up a second camera so you can see the whole setup and resulting issue
It does rotate, it changes nothing other than focus. I’ve tried removing the lens and reorienting it as well. It’s not something blocked out, there is no portion of the sensor blocked off, it’s aligned in such a way that it only uses half the lens. Even when rotating the lens the image doesn’t shift so it means the edge is perfectly aligned with the center of the lens curvature on both modules.
Interesting that you’re describing an issue isolated to the lens setup itself. In that case I’m wondering if this is a feature rather than a bug.
It would be interesting to swap the optics with another “good” camera. Do symptoms move to the other camera and resolve it on the problem camera? If so, that would definitely isolate the issue to the optics.
I see this camera advertised in both 110° and 64° variants. I’m wondering if this is just an issue of mislabeling.
And the approach for the 64° version being odd where it goes from outer edge to center. Do you see more distortion on the portion of the image on the outside of the lens and potentially more detail for the portion of the image resolved near the center of the lens?
The displayed image looks roughly square to me. Is the camera in landscape orientation? The overlay on the image seems to imply 640 pixel resolution. I assume that’s for the width. The height is unlikely meant to also be 640 pixels.
In that case it seems like to me that some portion of the image could indeed be getting cutoff.
Loool yes the app was trying to display the full image and just ending it there 
My new camera is doing about the same thing. Normally it’s straight, but even then the lower 80mm will not show and about 20mm on the top. That’s with the camera centered on 200mm on a 400x400 work area… see picture , it’s skewed right now because I’ve been messing around. Laser is a Longer ray5 10w.
