Walt Anderson Gimbal Head Adapter
By mounting this lightweight (5 ounces) bi-directional adapter on your (old or new) Wimberley Head you can mount a short lens on your Wimberley Head. For bird or wildlife photographers who like to create an occasional scenic photograph (while using slow shutter speeds) the use of the B-DGHA provides a workable solution to a difficult problem. You will--of course--need a camera body plate for your camera. For creating horizontal images, we recommend using the generic Wimberley P-5 plate.
Now, here is the part that you will hear only from BAA: in order to use the bi-directional plate successfully, you will need to level the tripod platform by adjusting the legs so that the floating bubble in the level on the tripod platform is centered in the scribed circle. (This process is described in detail in the Practicalities Chapter of ABP II on page 394.)
If you wish to create vertical scenic images with a short lens, you will need to purchase an "L" bracket. I do not like them. Routinely keeping one on your camera body increases the weight of your rig by almost 1/2 pound and greatly impedes camera body handling (as does keeping a camera body or wrist strap on camera that is attached to a tripod-mounted lens.)
It is my belief that if you are a serious landscape photographer you should be using a lightweight ballhead.