Are roses red?

As the RP and the M42 lens adaptor have arrived I've not been wasting any time playing around with it. No RF lens yet, but with bokeh like that I'm in no rush. Also been getting to grips with darktable (open source version of Adobe Lightroom for Linux users). I quite like what I see so far.

Lens was the Pentacon 3.5/30 for those who are interested