Here are a few shots I took a couple of years ago. These may have compositional and technical shortcomings but I hope they will help. Photos had highlights and shadows adjusted, with modest enhancement of things like saturation and contrast. All shots were taken with a Df.
This shows the setup for the dollhouse photo; I ended up posting a shot without flash.
OLYMPUS DIGITAL CAMERA by
Bill de Jager, on Flickr
Interior of dollhouse, aperture set at f/11. Despite short focal length and small aperture setting the close working distance limits depth of field.
_DSC8668 by
Bill de Jager, on Flickr
Near-far shot with lichen on tree trunk; aperture set at f/11. No flash, and the short working distance reduced light on the center and bottom of the subject.
_DSC8703 by
Bill de Jager, on Flickr
Actual pixels showing short depth of field:
_DSC8703_center_crop by
Bill de Jager, on Flickr
Shot with flash; aperture set at f/11:
_DSC8708 by
Bill de Jager, on Flickr
f/5.6, no flash:
_DSC8722 by
Bill de Jager, on Flickr
Cropped, shot at f/11, no flash:
_DSC8742 by
Bill de Jager, on Flickr
Cropped, shot at f/8 with flash:
_DSC8793 by
Bill de Jager, on Flickr
Conclusion: The lens is fun to play around with despite technical limitations intrinsic to its short focal length. The short focal length requires getting very close which counteracts the depth-of-field advantage you'd expect from that short focal length. The short working distance also can interfere with lighting the subject.
I see this lens as more of a lighthearted creative tool rather than a serious macro. I'll have to try it on the Z6!