Cree and I have been exploring our local refuges, state parks and natural areas a lot this winter. We wind up photographing a lot from our truck. Ever notice the second you get out of your car and the wildlife runs or flies away? Your car acts as a natural blind, and eliminates your silhouette. The second you get out and away from your car, chances are really good the animal will take off. Photographing from your car is actually pretty easy, even with long telephotos. The only challenge is lens stability.
To stabilize a long lens on our car door we use the Lens Coat Lens Sack. This is a heavy duty U shaped bag you can fill with beans, rice or sand, and use it on top of your door for support. The Lens Sack comes with an optional plate and tripod mount so you can use a tripod head on the Lens Sack. Better yet, if this feels more unstable, then you can remove it and just use the bean bag sack. I also use this bean bag for shooting on other surfaces and locations. Cost is around $100.
I think I have mastered the 600mm F4 drive by wildlife shoot. I just rest the lens out the window and drive slowly through the refuge…looks pretty funny with a huge lens sticking out the window. But when I see a quick shot I am ready to go. And using the Lens Sack prevent any damage to the door or window resting this heavy lens. I just have to remember to put the car in park!