[gregbradley]

I checked the EV steps and you are absolutely correct. I switched it to .5Ev and there was the F2.4.

I went outside and imaged again. Still looks respectable but with noticeable blue chromatic aberration on the brighter stars (Samyang 12mm F2 does that).

I'd say that is still useable with reducing the chromatic aberration in Lightroom.

Here's some samples from tonight. I am pretty happy with this. Considering also I would almost for sure be using this lens for overlapping panoramas that little bit of coma in the corner is going to be cropped out by the overlaps.

For AUD$587 it seems to be providing a fairly large slice of the Sigma Art performance. Still, I'd like to try out that Sigma for myself (its $1959 and a whole lot heavier).

Greg.