Quote:
Originally Posted by nebulosity.
Really top work Russel! Fascinating seeing what the O3 does!
Cheers
Jo
|
thanks Jo
Quote:
Originally Posted by britgc
Nice. I quite like the RGB OIII blend as well Russell.
|
thanks brett
Quote:
Originally Posted by gaa_ian
On the subject of OIII filters, do you guys know of a list of the DSO's that most benefit from the use of an OIII rather than a UHC ?
I have had a high demand for my UHC/Nebula filters, but few specific requests for OIII filters. They might be worth having a few on hand ?
|
g'day Ian that's a good question i'm not sure how narrow is ideal for visual.
photographically the good thing about OIII is that you don't need a modded dslr to use them.
http://www.iceinspace.com.au/forum/s...ad.php?t=12896
http://www.cloudynights.com/page/art...ky-objects-r60
Quote:
Originally Posted by Flugel88
|
thanks for kind words, I went pretty heavy on the noise reduction in the fainter areas but think the blend came out alright. the rgb subs were 70 seconds and the OIII subs were 4 minutes.
Quote:
Originally Posted by Akwestland
Russell,
Great pics. One day I would love to be able to this. I really enjoy comparisons like this as it allows me to identify what items I may need to look at down the track.
It would be great to know a little more about how you gained these results. i.e. telescope/lens/filter(s)/aperature/shots/processing/and all the other stuff that I need to find about 
Great work.
Cheers
Andrew |
Thank Andrew.
these were taken on my 12" f4 newt which is on an eq8.
RGB subs were 70 seconds at iso 1600 and the OIII subs were 4 minutes @ iso 1600. if I could take longer subs more OIII would pop out of the area but the noise was too much
i'm limited to 70 second exposures on rgb because of light pollution - I have ordered a light pollution filter which will allow an increase in the sub time (a cooled camera would increase the sub time even more).
the camera was a modified canon 600d. I think the total integration time was about an hour and 45 mins or so.
i use an off axis guider to guide the mount and have a RCCI coma corrector. i used to use a MPCC (coma corrector) with the OAG but to use a filter would have meant i would have to use a clip in filter (specialised for canon cameras) as the MPCC has a shorter spacing distance. i wanted a filter i could use on other systems (2"). I would recommend the RCCI over a MPCC as it allows greater flexibility in guiding and filter choices due to its greater spacing.
I stacked the images in Deep Sky Stacker and processed the stack in photoshop. i did have some trouble blending the OIII to the rgb because the frames weren't that close. so ended up doing it in photoshop manually.
http://www.iceinspace.com.au/forum/s...d.php?t=132073
if you are looking at getting a new system you won't need that much aperture an 8" newt on a HEQ5 or NEQ6 will give great results.
i hope that makes sense!
Cheers,
Russ