Experimenting with Depth of Field in Macro Photography

In this video I get to grips with my new and very reasonably priced Samyang 100mm Macro lens and do an experiment with a tape measure to find how depth of field is affected by distance.

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Equipment :

Sony RX100 Mark7 - vlogging camera
Sony ZV-1 - vlogging camera
Sony A7R4 - landscape camera
Sony 16-35 GM Lens
Sony 24-70 GM Lens
Sony 100-400 GM Lens
Sony 200-600 G Lens
Samyang 100mm Macro Lens
Sirui Tripod
Rode Wireless GO audio