I'm trying to make a set of night vision goggles using drone parts. I am planning to connect a Runcam night eagle 3 directly to the AV In/AV out port on the [/url][url=https://www.skyzonefpv.com/collections/goggles/products/sky04l]Skyzone SKY041L

Here's where I am confused

So the Night Eagle 3 is advertised as having 1000tvl which according to this website is equal to 1280x720.  The Skyzone goggles have a resolution of 1280x960 but according to this site the composite video signal can only carry 576i.

Am I overspending on resolution that I will not get or am I missing something here?

1000 TVL will mean that the camera sensor will acquire more data and scale it down to NTC or PAL specifications.

If we compare images from a 600 TVL camera vs a 1000 or 1200 or 1500 TVL even via analog video feed we can seen the difference.

whats written on the paper doesnt need to match the truth ;-)

over analog video transmition, its limited to about 600tvl. a 1200tvl cam does still only show about 600tvl.
for analog fpv, tvl doesnt truly tell anything, i dont know a cam with less than 600tvl.

the tansmission is the bottleneck, you would get the full resolution with other connections than analog w
video transmission.
you wont get the relsolution rated on the goggle or cam by an analog vtx. its an old myth, its like teleshopping how the cam manufacturers provide a low resolution imagge and a high resolution image next to it, describe the tvl as the difference and its just far away from use over analog video transmission.

a higher resolutio on a cam can make a difference for dvr revording as example.

@kafie
it seems to be the tvl which makes the better image, but i believe other abilities of the image sensor does let higher tvl rated cams provide a better image.


edit:
the av in of your skyzone is limited to 576i?

(28-Jan-2023, 02:21 PM)hugnosed_bat Wrote: the av in of your skyzone is limited to 576i?

I'm probably going to sound like an idiot but...

Nowhere in the manual does it say the skyzone av in port has a resolution cap
I'm confused because I read conflicting information what the limits are with this kind of setup. if composite can't do HD video why build HD goggles?

Here is some more context:

There are no radio transmitters involved in my setup the camera will be hardwired into the fpv goggles.

I built a binocular version of the BPNVGs and the problem with those is that, while sharp the 320x240 2" displays are very pixelated. (a light bulb at 10 meters away is a few bright pixels) I already have the Runcam cameras and I'm looking at fpv goggles to use as a higher res display  

I know what I'm trying to do is very niche and not the intended use for fpv goggles but I was hoping someone with more experience could clear this up.
Thanks in advance!

Its not a resolution cap by Skyzone but a limitation of the AV signal (protocol) due to its limited bandwidth.

The great thing with analog AV is that its simple but has its limitations.

Did you consider a security night vision camera that directly outputs HDMI what you can plug straight into the HDMI in port of the goggles? I know the camera will be more expensive compared to an analog FPV cam but will give you a fairly high resolution.

If the A/V port is analog, it will support two formats:

NTSC - 480i
PAL - 576i

This is interlaced video running at 59.94 fields per second (29.97 frames per second). For PAL it will run at 50 interlaced fields per second (25 frames per second).

Digital will serve you much better.

Thank you everyone for the quick replies.

Based on what @hugnosed_bat, kafie1980 said, and on my own research there is no benefit to spending extra on the HD goggles.

This answers my question, thank you guys for the clarification.