Helix in bicolour

[TrevorW]

Nice one Paul, although background appears overly dark IMO and some star elongation

[Paul Haese]

Thanks guys for the comments.

Originally Posted by TrevorW

Nice one Paul, although background appears overly dark IMO and some star elongation

Looking at the image during the day will present as being dark, at night it looks quite light. As to star elongation that, there is non. In the full res version the stars are quite round. Not sure where you are seeing this.

[TrevorW]

Must be my eyes then ? as I checked the large image and it appeared although slight to me in both top left but moreso bottom left stars

[strongmanmike (Michael)]

Originally Posted by TrevorW

Must be my eyes then ? as I checked the large image and it appeared although slight to me in both top left but moreso bottom left stars

If you are seeing star elongation Trevor, perhaps your eyes suffer from astigmatism? This will tend to elongate tiny dots, try looking very closely at the screen and enlarge the image, do you still see any elongation..? Any elongation I can see (and I can't really) is trivial and minuscule

Mike

[tilbrook@rbe.ne (Justin Tilbrook)]

Originally Posted by strongmanmike

If you are seeing star elongation Trevor, perhaps your eyes suffer from astigmatism? This will tend to elongate tiny dots, try looking very closely at the screen and enlarge the image, do you still see any elongation..? Any elongation I can see (and I can't really) is trivial and minuscule

Mike

Mikes right, I suffer from astigmatism and see exactly what Mike describes.
I have to check very carefully to be sure of my star images.

Cheers,

Justin.

[Paul Haese]

Just to satisfy my own curiosity I have included the top left and bottom left stars in the image at full resolution. I think they look pretty close to round to me, with ever so slight out of round defects; which is most likely a stacking, scaling issue or even focus being just slightly out. The original image I presented is at around 85%, so seeing any defects would be very hard to see if not impossible.

[TrevorW]

I do suffer from an astigmatism so obviously it is my eyes (very short sighted old cranky and fart a lot too)

Sorry

Keep my mouth shut in future