How much (approx) are you looking to spend on the FPV set up? Do you want onboard HD recording?
You will want a fairly powerful VTX to get the most out of gliding. How much space is there in the fuselage and is there somewhere you can mount the VTX where it will get good airflow?
Do you wear glasses?
I think I could spend around 150$ for the whole setup. HD recording doesn't really matter because I have a gopro I could mount on the glider. I don't think i'll have space issues because the fuselage is quite long (around 1m). And no I do not wear glasses.
There’s a big weight saving in running a combined fpv camera and HD recording camera vs using a go pro. If you are even thinking about taking footage with it and have room for a 20 x 20 double stack in there then you should think about that vs just a camera. It’s worth a bit more spend to save the weight.
If you don’t have anything against box goggles I have used the Eachine EV800 non diversity ones with a decent omni antenna for loads of things, mine have worked out to 500m with a 200mw transmitter and they convert into a monitor screen for LOS flying or showing friends the view from the camera. They are about $50 new and have a bigger screen than nearly all the comparable sets of goggles under $100
I like the Foxeer Preditor Mini the biggest reason is how well it handles light to dark aka straight into the Sun and turning away, very bright background can still see well of what landscape is there. fPV transmitters I have not found a ton of difference myself, others may say something else. Make sure it has a easy way to change channels and it is easy to operate and get to it NEVER NEVER turn on power with OUT the antenna connected or you will be buying another one...
I use the Runcam microswift2 cameras in my quads. Its one of the few cameras that lets you fully control light handling and not force just using presets. Most cameras on the market STILL come with a default setting for stationary indoor use on artificial lighting.
The VTX I use are this type. There are several versions just rebranded that are exactly the same so shop around for best prices. Video is ROCK solid and most of the time I rip my quads around on 200mw with short dipole antennas. If you really want the best performance throw and AXII stubby antenna on it and youll be super stable for longer ranges.
Any camera will work with any VTX. I like both to run from the same filtered power supply, either battery voltage via LC filter or 5v via the BEC, if you want to do that be sure the voltage of both is compatible. Look for a VTX with a 5v output and a camera that uses 5v if you want to do that, check the VTX takes 5v in if you want to run it off the BEC.
Most new cameras and vtx run off 2s to 6s supply. So it boils down to power management on your system and longevity of the regulators themselves. I like the new regulators on FC as they do 10v supplies which is a happy medium between the 5v and 12v. You are not underpowered on 5v but your not sitting there cooking on 12v when not moving thru air.
The vtx usually use a harness that comes with them. So no soldering on the actual vtx. If you mean plug and play you would have to look around and source a premade harness that would just plug into what ever connector your bec has. Other then that no you have to solder or crimp the ends to match your power supply. Most vtx these days can run on 2 to 6s power and have their own filtered supplies built in for cameras.