The image was taken with the lens fully extended to 150mm. I find it to be acceptably sharp at this focal length. I'm really glad that most systems nowadays contain some sort of an image stabilisation system. I'm finding that I can't hold the camera steady at slower shutter speeds anymore. That's a sure sign of getting old (or older). Some people will argue that IBIS is better than ILIS, but personally I don't care which system is incorporated into my systems, the main thing is that it works.
Image again converted with Nik SFX2.