As a second test for my 50-230mm, i took some photos of aircraft going over my house at cruising altitude.
The point of this test, was to see how well the lens would be able to pick-up and focus on an object, a very small object when viewed from the ground.
The lens had no problem in focusing on such a “small” object and when i zoomed in on the photo, the clarity & resolution was fine.
The first aircraft that i picked up, was this British Airways Boeing 747-400. This is flight 195 from London Heathrow to Houston Bush International in Texas.
He was cruising at 38,000ft at a speed of 451kts (519mph)
This second aircraft is an unknown. I did not get a shot of the tail, but i am thinking it is a Delta flight. I was to late in looking it up though.
The 50-230 is definitely a keeper. It has performed very well and has given very nice results. I would certainly recommend this lens to anyone looking for a nice, telephoto zoom lens.