Friends, this is another test of Tamron 150-600 mm sharpness so those who are not interested can tune out now, this white-throated sparrow was on a bird feeder at Hawk Ridge, I was about ten feet away and the day was beautiful.  This would simulate conditions that i usually shoot little birdies, handheld and sitting on a rock.  No sharpening on this image just straight out of the camera, the bottom image is an extreme crop to show the head details

This image is pretty sharp and the one below has some minimal sharpness added in photoshop, so til Tomorrow MJ