Samsung NX System

There were no photos from different lenses, the lenses themselves were placed facing each other head to head using a double male-male coupling ring adapter. It's a cheap solution for macro AFAIK but the downside IQ-wise is the aberrations, which can be reduced up to a point in LR. Furthermore its practically impossible to focus on purpose and DoF is tiny, really tiny, so you do this:

Tripod, lights, subject in place, interval 3-5 sec depending on the stability of your installation, and then you start shooting and changing the focus point during the intervals. Import SRWs in LR, correct them and export. Open photoshop and File->Scripts->Load files into stack. Browse and find your jpegs and click Ok having clicked the box that says "attempt to automatically align source images". When it finishes importing all layers, select edit->auto blend layers and stack images (no panorama) having clicked the "seamless tones and colors" box.

Flatten image, crop and you're done.

The more shots you take, the better it gets, less focus changes every time, better sharpness in the final picture. This attempt was done with 22 exposures but don't be lazy 'cos if you watch carefully, there is a small portion of the screw's head that is not in focus, and that's because I assumed it could not be seen and being lazy, I rolled the focus ring more that needed in those 2-3 intervals.

Lots of work for you and your computer, especially if you import 30-35 full size 28Mp jpegs in PS, which I strongly recommend IQ-wise, let the damn machine melt

If you are bored doing all this, you can find flat surfaces in a plane exactly parallel to your camera's view and take a single shot using timer to avoid shaking. Like this one:

KMZ

Have fun