Sigma Sd Quattro and 150 f2.8 OS, the power of the Macro

 
 
Now,  a little more abstract 
 
 
Spiral
 
 

 

A mid section of an Ammonite

 

 

 

This is a 100% crop to show how amazing is the detail

 

 

Optical art
 
 
 
 
 
 
 
 
 

 

Section of a Dinosaur bone

 

 

Fractals?
 
 
  
 
 
 
 
 
 
 
 

 

 

 

 

No, just a detail of this Ammonite

 

 

Colours from the dawn of the Earth
 
 
 
 
 
 
 
 

 

 

This photo is worth some more detailed explanation: it is a sedimentary rock made by cyanobacteria and is more han half a billion years old. These bacteria were among the first living organisms on Earth and the first to produce  oxygen. It is called stromatolite. Only touching it make me shiver with emotion. Stromatolites are still made  today by the same bacteria in some harsh  environments like very salty (hypersaline) lakes and lagoons in  Australia

 

 

Conclusions
 
 
Given the limits due to lack of reliable autofocus, using a true macro lens with a camera equipped with such a  sensor, able to give plenty of informations and detail  (that may well be expected from  larger formats), for macro under controlled lighting,  is something one has to try to believe. 
 
Incidentally,  recently I had to go abroad to take photos of some specimens  for my "real" research, and had to use my own equipment (not that bad anyway: a 24mpx Dx DSRL and 105 Vr Micro lens). I have to admit that If I could have brought with me a Sigma Sd Quattro with a macro (preferably a 105mm f2.8 OS), I am sure that would have come back with a lot more detailed (=rich of information) shots.
 
And I leave you with this fossil Ginkgo,  another gem out of time.
 
 
 
 
 
 
 
 

 
Finally, also this second try (half  test, half creativity performance) has been fascinating. I am really grateful to all who permitted me to make this experience: the Curators of the Museums who granted me access to the specimens under their care, my friend Gianni, Mauro Maratta whose contribution was literally  ... lightening , and also Marco Pagani who came to visit us, a newbie for Nikonland but a long time acquaintance for me.
 

 
Again, my sincere thanks to Mtrading, the Italian dealer of Sigma products, for the kindness and generous offering to try their products.
 
 
Silvio Renesto for Nikonland