In a previous post I wrote about a focus stacking effort I made with images of a model aircraft at a show. I had been meaning to have another go at this and do so in a more controlled environment. I then ended up buying myself a macro lens for use in my negative scanning efforts and immediately started playing with it to shoot things close up – it’s a macro lens for goodness sake!
As an f/2.8 lens, when shooting macro shots, the depth of field is really shallow. This got me thinking about trying another focus stack. A small Leatherman seemed as good a target as anything. I set up with manual focus, put the camera on a tripod, went to manual exposure and then shot a sequence with small changes to the position of focus for each shot. Then it was off to Photoshop.
Photoshop did a pretty good job really. The distortion of the areas out of focus means that the area that the subject covers can vary quite dramatically as the focus shifts backwards and forwards. The algorithm did well getting things masked and blended. The only bit it struggled with was at the very top where the knurled edge seemed to confuse it a bit. The top shot is the finished effort while two others are included to show how much things are out of focus in the individual shots.