Pretty much all wide-angle landscape shots got something going on in their foreground, but if you’re placing objects to close to the lens it’ll soon get out of the focus area. You basically can’t prevent this physically, but there’s an easy way of fixing this using multiple exposures and Photoshop (should be working in Gimp to, if you’re using that 😛 ) – Focus stacking.
Just like you shoot multiple exposures to get a bigger dynamic range for an HDR shot, you can stack different exposures with different focus points and overlay them in Photoshop. A tripod is a must-have for focus stacking.
Before you start to edit your photo
Before we can start editing the picture with Photoshop, you need to shoot the different images first (lol really?). It’s really simple, just place your DSLR where you want to have it. Then set your focus to infinite, hit the release, now you have to gradually decrement the focusing distance. As you go further down with the focusing distance don’t forget to shoot (don’t forget – we need several images to blend over and extend the depth of field). Of course this could be a problem with moving things such as animals.
Aligning your pictures
Once you finished taking those shots, start up Photoshop, place your shots over each other, select all (click on the layer at the bottom then hit shit + click on the top layer) and go to Edit > Auto-Align Layers ..
Blending the images
Once the aligning process is finished (can actually take a few minutes) go to Edit > Auto-Blend Layers .. and choose Stack Images then hit OK.
That’s it, easy focus stacking in just 3 simple steps. By the way, you can use this technique also for macro photography. For example if you want to get a really close up shot of a flower and you want the whole flower to be sharp.