I know it's just a cloud formation, but looking at the shape of it, what does it make you think of?
In my opinion, this is an impressive lens, and if you get one in decent condition, keep hold of it. I'll be checking out its qualities using the "High Resolution" modes on each of my E-M5 II and E-M1 II cameras and will post the results here.
A Quick Comparison
I recently acquired the Tamron 35-135mm f/3.5-4.5 Zoom lens, which I'd been after for a while, as I'd heard and seen some great things about it and wanted to check it out myself.
Here they are side by side with the Zoom on the right set to the 135mm position.