Why not a pentax 55-300 ?
The DAL version is almost the same price as the non APO sigma you don't have a hood though...

Oh no it just shows that Pentax has the best sensor and the Lens can't keep up

From your shots it looks lovely though, I wouldn't worry a bit

What kind of focusing program do you use, do you select the focus point yourself, only use the centre focus spot or let the camera decide?
If you do the last one that might be your problem.

Doug it's not really the roundness that's important but the way the light is distributed inside those circles. Pentax and Zeiss tend to have a slight ring around the edge and that makes the bokeh busy.
What you want is the bokeh you see from the taillight of the car, the very soft edge of that would draw a beautiful "creamy" out of focus blur.

Here this a photo of the beloved FA 77mm ltd, just look at the upper left corner. link
You can spot some individual bokeh there and you see it's almost doughnut shape and you see the type of out of focus blur that gives.

I'm looking at the photos of the older version on Photozone.de and I must say I love the Bokeh of this lens, it's better than any pentax or zeiss around that range.
Here just look at it (big photo) link

It does look classy Doug

Thank you Doug, it looks like a pretty lens, I wonder if it's better then for example the Tamron 90mm or Pentax DFA 100mm

Totally forget they still exist

This the new beauty and you can get it today for Pentax.


http://www.voigtlaender.de/cms/voigtlaender/voigtlaender_cms.nsf/id/pa_90mm_f3_5...

Price is €549/£464

Do you think this lens is any good?
I wonder how it compares against Zeiss.

Thank you for the offer Dave, I really appreciate it but it's to busy for me right now to accept it. Will certainly keep it in mind when I've less things on my mind.