Dave asked me to load one of my tree pan shots with an explanation. This is a rework of a previous upload as I could not locate any of the recent ones on the portable drive (they are stored on main PC, but had hoped one was on the drive).
Technique: Find a good stand of trees, it is best if there is some good light to one side, as this will give the image some dimension which is missing if you try this in flat light. Use a tripod (yes you can do it without, but the result will be more haphazard). Any style of tripod head can be used, but if you have one a gimbal is actually perfect for this as it will let you pan smoothly in line with the dominant trees (easy with pines as they tend to be quite upright).
The shutter speed used is really dependant on how quickly you pan from top to bottom, anything from 1/8th of a sec to 2 secs can work. The aperture is less important as you are not after a sharp image, so select whatever gives you your desired shutter speed. Focus is also not critical, it needs to be approximately on the main tree in your image, but it does not have to be spot on.
Be sure not to have any sky in the shot at the point your exposure starts. And I say exposure starts for a good reason, the smoothest pan is achieved by setting your self-timer to 2secs and point your camera to the just above (or below if panning upwards) the start point of your image. Press the shutter and commence panning, by the time the shutter releases after the delay you will be in the middle of a smooth pan, continue panning past the point of the shutter closing. This is good technique for all pans.
I have to thank a couple of people for introducing me to this technique originally, Pete Cairns and John MacPherson, but it was Mark Hamblin that let me in to the 2sec delay technique, which proved to be the key in achieving some acceptable results.
So there you go, all those that wanted another water collision will have to blame Dave.
Oh and any dust spots on your sensor will stand out a mile in the resultant shot. And yes you can do it in PS as an afterthought, but there is more satisfaction in creating this in camera.
This was taken near the osprey centre at Loch Garten.