Sigma 150mm 2.8 Lens for Canon DSLR cameras

Selling on behalf of my father.  Externally, the lens seems to be in great condition with few signs of use.  The odd mark on the foot plate but I'm struggling to find much else to mention.  The glass is good externally but I can see a little internal fungus and dust inside.  I can see some signs of this in images if I stop the lens right down to F/16.  You can see this on the sample image I've attached which is shot at F/16 on a crop sensor.  At wider apertures it seems to be okay. One of those things you see when you're inspecting something to sell it but my dad hadn't noticed at all.  Image quality is superb I have to say!  

The focus control feels great and everything works as it should.  

Comes with both original caps but no hood and though it has a box, it's a plain white one.  I'll package it carefully.  

Delivery by Royal Mail Special Next Day Service for a little peace of mind.