Thank you so much to all of you!
This one was 60 seconds exposure, 30 of them, if I recall correctly (i'm on my laptop and I have the data at home!)
The Pentax 105SDHF is an amazing instrument! I can fully illuminate my 35mm chip and I have absolutely NO worries about cropping the edges because of coma, or similar!
Something way way better than the 105 is coming though! So this might be up for sale!