How Did This Halo Effect Happen?

He's got a new proper Pentax telephoto lens for his red Pentax and I had a play.
No idea how Olive The Lodger got this halo effect with the colours of the two poisonous trees of the background. Not camera shake as her whiskers are really sharp and clear. Any suggestions anyone please?

[Hazel]

Is it somehow a reflection?!

[Richard Brown]

Interesting shot. I wonder if the shallow depth of field is blurring the background into the foreground....

[Larry L]

You've got a 1 second exposre, I preume the cat moved? Did you have a flash? I've seen a "double image" effect w/ flash and slow exposures (not intentionally!)

[John Falconer]

Nice image. For a cat -:).

[Walks @ 7]

I like this, the cat's eyes are truly cool. I did find this on the web that might explain it ( http://www.popphoto.com/how-to/2013/04/how-to-use-halo-lighting-portrait-photography#page-2).

[JackieR]

@quietpurplehaze possibly, with refraction through double glazing?
@rjb71 could be!
@lsquared no she didn't move as whiskers so clear but did use flash
@johnfalconer for a cat, I agree
@joysabin didn't think to Google it!! Could be reflection from window shining back! Thanks for taking effort to find that link

[mittens (Marilyn)]

Sweet capture.

[Hazel]

@30pics4jackiesdiamond

Perhaps. I had similar with a portrait taken by a window and only saw it on uploading.

[JackieR]

@mittens thank you
@quietpurplehaze she looks cute wreathed in purple light!!!

[Sally Ings]

Interesting effect and some nice ideas as to why it could have occurred.

[Hazel]

Unfortunately mine was a garish yellow - and caused me significant angst!!! @30pics4jackiesdiamond

[Joan Robillard]

Neat

[Brennie B]

very effective though.

[JackieR]

@brennieb I want to recreate it though!
@joansmor thank you
@quietpurplehaze oh dear ;(
@salza I know, aren't people kind to come up with suggestions!

[Brennie B]

@30pics4jackiesdiamond
one of those northern lights effect maybe! so annoying when you want to recreate again

[Larry L]

Check out the examples in #7 and and #14... https://photography.tutsplus.com/tutorials/how-to-use-flash-with-a-slow-shutter-to-create-motion-and-ghosts--photo-95

[wendy frost]

Strange Happenings around Olive. Pretty background colours.

[JackieR]

@lsquared thank you, but nothing moved!!!
@wendyfrost those trees are beautiful this time of year, thank you
@brennieb just won't happen on purpose!!

[Ashley]

Beautiful background! My guess would be a jackmanii tree????

[JackieR]

@shesnapped a lilac and a laburnum thank you for asking