Originally posted by Canada_Rockies Very well done. I have never used focus stacking; I guess it's about time.
Thanks ! In this particular case the process was very time consuming. First of all I had to find to carefully position the shell, so that it would cover as much space in the frame as possible and at the same time would meet the requirement of a minimal focusing distance for this particular lens. Refocusing was not a big deal and after a couple of tests I determined that I can trust AF on that.
So, I got 4 pixel-shift images. My main RAW converter DxO Photolab 3 does not recognise the extra info in the files, so I had to use SilkyPix Developer Studio Pro 9 to convert RAWs into RGB images, in this case TIFF. Because I prefer the way DxO handles the images (lens profiles, volume deformation, smart lighting, etc.) I did only the basic adjustments in SP, before converting the files to TIFF. But you cannot simply open the resulting files in DxO, as it won't recognise the lens model. Apparently SP strips off some EXIF information when developing the images. So I used EXIF Tool GUI. I developed those same images in DxO without any adjustments. It resulted in 4 TIFF files. I copied all the metadata from these files into the pixel-shift TIFF files. I opened the updated files in DxO again and voila, it recognises the lens and the camera. I adjust all of the images to my liking using identical set of corrections for each. Then I realised that the lights changed between the shots, so I had to re-adjust individual exposures to achieve a uniform luminosity across the series of images. The process of focus stacking in Photoshop was pretty straight-forward. Afterwards, I only cropped the image.
As you see lots of time spend to make one single image