Video: How to blend exposures with different shutter speeds
If you've ever shot a landscape subject where you needed a combination of a short and a long shutter speed, then this video by Adam Gibbs may be just the ticket. In it, he shows how you can use Photoshop to combine two images captured at different shutter speeds.
A common use for this technique is subjects such as waterfalls where a long exposure is necessary to blur water, but if the shutter speed is too slow any movement in foliage also in the frame will blur. Capturing a separate image at a shorter shutter speed to freeze the movement is the solution.
Then, a blend of the two images with auto-align layers in Photoshop and some masking will create an image with the best parts of the two exposures.
You can see more of Adam Gibbs' great videos on YouTube.