The Facebook link now takes you to my timeline photos, which, when you click on the image in question goes to a higher resolution image.
I'm sure that I had linked from the big image, maybe FB changed the behaviour of the links?? Or maybe I should get off my ar$e and maintain my website?
That looks stunning. was it taken from suburban skies?
Did you do any sharpening during processing? if that's native, its really impressive.
what was the fwhm? (sorry, obsessed with that at the moment :-))
how did you get the white stars?
That looks stunning. was it taken from suburban skies?
Did you do any sharpening during processing? if that's native, its really impressive.
what was the fwhm? (sorry, obsessed with that at the moment :-))
how did you get the white stars?
Cheers
Alistair
Hi Alistair,
Thanks.
Yes, Werribee.
Yes, I use the PS Smart Sharpen filter, Louie Atalas made some great tutorials on how to get the best from your images (www.atalas.net). That's why I shoot so many hours of Ha data, the deeper the image the more sharpening it can handle without getting too noisy. There is a trade off though, the gains are reduced the longer the exposure time, and with longer subs a lot of things can go wrong. This one was collected mainly as 15 minute subs, I tried a couple of 30 minute subs and there was very little gain between a 30 minute sub and two 15 minute ones. I'll attach the unsharpened median combined Ha image for you (50% reduced in size, 50 quality jpeg).
FWHM of the combined exposure was 3.38 according to CCDStack, individual subs ranged between 2.16 and 2.64. This was a particularly good night for seeing from my place, these numbers are also probably smaller as I was shooting narrowband. The worst one was the 30 minute sub, which had a tracking error in it, at 3.6, including this didn't adversely effect the FWHM and it was hard to throw away 30 minutes of imaging.
White stars are easy, follow this tutorial on narrowband colour processing (http://bf-astro.com/hubblep.htm), this will also give you the gold colour and reduce the violetness of the stars.
cracker image Stuart.
!!! luv it
