My K3 Monochrome arrived...and not an hour had passed before I spotted the first speck of dust upon the sensor!
Also I forgot how
stupidly wide this lens is:
Pentax KiMONO - Sigma 8-16mm f/4.5-5.6 @ 8mm ISO 320 f/11 1/500th + modified STC filter with orange HRMC coated filter glass.
This is already a pretty substantial crop, with an apochromatic lens like the Sigma 100-300mm f4 APO the detail even at High ISO is very impressive.
Pentax KiMONO Sigma 100-300mm f/4 APO EX @ 220mm f/8 ISO 3200 1/125th