Cathedral Lights

@Hoshisato: Thanks Hoshisato! Yes, I believe the aperture blades are rounded on this lens but I've no idea how that works....it's just something I read but it certainly seems to make a diiference on this lens and on my 105f2.8 micro. One from that lens tomorrow.

@Mirko Herzner: Thanks Mirko....I've always enjoyed looking at other peoples bokeh shots so I thought I'd give it a try for myself :-)

@Anna.C: Thanks Anna....I'm really pleased that you liked it!

@MadScientist: Thanks very much!

@Frida: Thanks very much Frida!

@John Leech: Hi John, Yes, I was experimenting with the lens at the time so I was trying it at all the wider apertures. I don't think the focus accuracy on my D40 is really up to coping with the F1.4 end however and the depth of field is razor thin with absolutely no margin for error. I suspect there's a calibration issue with the body as I have exactly the same issue with a Sigma 30 f1.4 lens too. Your D300 would be okay though as you can calibrate the focus on that camera body which is not an option on my D40. Manual focus override with these newer afs type lenses is a doddle though so f1.4 is possible if the subject is stationary. With regards to F1.4 lenses and portraits/bokeh take a look at the work of this pro photographer: http://www.flickr.com/photos/alfiegoodrich/sets/72157613320638663/

@Lorraine: Thanks Lorraine....control over depth of field is one of the better reasons (if one were needed :-) for switching from your compact camera to a DSLR.