If you don't want to spend any money, then don't. $100 will not buy you a gimbal that you would want to put $2000 or more worth of camera gear on it. Buying a $100 gimbal is like buying a Vivitar 650-1300mm F8 zoom lens for $200 and attaching a Nikon D40X to it, and putting it on a Sunpak tripod - it's a cheap solution, but not one that you would want to use, and a total waste of your hard earned money. You have a nice lens, probably a nice camera. Spend the money for support that will do it justice.

That being said, the least expensive gimbal head, with the simplest design, is the Manfrotto 393 for $175. I have used it with full confidence in subzero weather, rain, at the beach with high winds, with an 11 lb 600mmF4 and a 3 lb D800 with a battery grip, and it performs flawlessly. It takes a few minutes to dismantle clean and lightly dry-lube the nylon bearing surfaces. It's not fancy, doesn't look like a Wimberley, but it gets the job done time and time again.

However, for my 6.5 lb Sigma 150-600 Sport I use my hands for support, and leave the tripod and gimbal home. I had to hike 4 miles in soft sand (in and out), so you know that taking 20 lbs of gear (camera, lens, tripod, gimbal) was not in the cards.

I took these this past Monday.




O my gosh I love these pics mine is not the sports

I suggest you save your money for other things, and don't "under" buy. There are lots of unhappy people with closets full of inadequate tripods and heads. Some have even experienced tripod or head failure and suffered equipment damage. I have yet to hear of anyone who has purchased the "right" support gear and completely regretting the purchase.