A while back, I treated myself to a ridiculous lens, which has the branding of Jintu. Others are available with different names, and all do the same thing – 420mm – 800mm, with manual zoom, manual focus, variable aperture.
I’ve mainly used it for relatively static things up to now, but as it was sunny at lunchtime, I snapped these Goldfinches on the feeder in the garden. Not the easiest of things to capture with this lens.