imagemeister Loc: mid east Florida

Well, as you can see the opinions/recommendations are ALL OVER the map !!

I have been using a monopod with great success for about 8 years now - with larger lenses.

At first I could not afford a head - so I just threaded a 3X5 inch flat plate to the top of the pod and rested my camera lens on it and tilted the camera at will - NOT the pod - but this really only works good with smaller/lighter camera/lenses. I do NOT recommend threading the pod directly to the camera/lens !

Today, this is the head I recommend - which is basically a tilt head with a panning feature ON TOP - This allows panning when the pod is anywhere off of true vertical.
https://www.ebay.com/itm/2D-360-Metal-Panoramic-Panorama-Ball-Head-for-Tripod-Monopod-Quick-Release-Plate/252978401116?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

I do not use nor do I recommend using ANYTHING on your car window ! ( especially if you want it to continue working properly). In a car, I use a shortened type of monopod between the door and the seat resting on the floor - raising and lowering as needed - and with the head I show above.

I do not use, nor do I recommend using a bean bag to rest your lens on - the physical contact of the bag can inadvertently CHANGE your focus or zoom - or impede your intentional movement of them !

juferavi Loc: Lexington, KY

Check this website, the prices are really good, also they have several different models.

https://www.camfere.com/monopods-accessories-2232/

SierraP Loc: Eastern Sierras

Don't buy the ball head for a monopod, too wobbilly. Try a manfratto 3232 tilt head. It adds less weight and allows vertical shots with a twist of the wrist.

thephotoman Loc: Rochester, NY

One would attach the lens tripod mount to the monopod. This should give you plenty of stability. My monopod by Manfrotto has 3 legs that are stored inside the pod. They also offer additional stability. I use a ball head for more flexibility in the angles.

jimneotech Loc: Michigan

Now I understand why there are so many styles of support mechanisms made.

imagemeister Loc: mid east Florida

Yes, cameras, lenses, and support systems have all become refined to the point where everything has mostly become application specific !

So, if you are going to cover all the bases efficiently, you will need more than 1 camera, more than 1 lens, more than 1 support system/head.