One of the questions I get asked fairly regularly is how do I get so much in focus (or so great a depth of field) in some of my flower photos that I take in my studio? People realize that since my camera is so close to my subject that it can be hard (if not impossible) to get everything the sharp focus.
The way I do it is to use a technique called focus stacking. Basically, I take multiple images of the same scene using a different focal point for each image, and then merge the images in software to create one image with a greater depth of field than I can get in a single capture. I used to use a program called Helicon Focus from Helicon Soft for focus stacking. These days I usually use Photoshop, with Helicon Focus as an alternate if I’m not happy with what I get in Photoshop.
Here are some slides for a talk I recently gave that give step-by-step instructions on how I do my focus stacking in Photoshop.
Do you use a focus rail to shoot?
No I don’t. I just put my camera on a tripod and adjust my focus manually