I've never used one and have no idea what to look for. I know they are pricey so I would probably have to try and snag one on the used market. I still have my same tripod (Induro CT213) and ballhead (Induro BHD2). Am I correct in thinking a gimbal head would be better to use now that I have the 7d II and the Sigma 150-600mm Contemporary or should I just stick with what I currently have? I know I am pushing the weight limit on the legs but I can't afford a new tripod and my Induro is still in really good shape.

So, what should I be looking at for + and - on gimbal heads? I don't know one from another. Do you think I could find a decent used one for maybe around $300 tops?

I want to be ready when the weather breaks and the birds are singing!!