800 mm ProOptic Mirror Lens on the bus

[Don Schaeffer]

I took the lens on the bus to try it out.
These are handheld at about 1/800 sec.

handheld at 1/800 sec

[Norfindel]

I think that only the 3rd picture is sharp, the others look blurry. You probably need to take into account the 1.5x crop factor, and use 1200 minimum shutter speed. That's a lot, but 800mm is very long.