Oxygen 3 filtered Eta Carina

[tornado33]

Hi
I used my 6 inch Meade F6.3 Schmidt Newtonian "Cometracker" and EOS 300D. Two 5 min shots at ISO 1600 with Lumicon Oxygen 3 filter (also passes H Alpha light). Used Curves in Photoshop to neutralize excess red.
http://www.users.on.net/~josiah/temp/o3eta.jpg

[mojo]

That is spectacular!
What's the yellow tinge in the bottom right hand corner?

[[1ponders]]

Now that's a great shot!!! :cool2: It looks almost 3D. Have you thought about cropping out the slight coma round the edge, particularly on the right above the "hot spot" (??? I'm assuming its amp heat. Its too localized to be skyglow. Unless of you have a light source in that direction :) ) Terrific Tornado.

[Comet Hunter]

Great shot Tornado! Inspiring...cant wait to get my teeth into some DSO's...

[iceman]

Fantastic, and also agree with Paul, cropping out the coma and amp glow it would look even better.

Come back more often!

[ving]

*faints*

my god thats beautiful

[Vermin]

Wow!
:jawdrop:

[gaa_ian]

Awesome :eyepop:
How does it look visually with an 0III filter ?
I was spending some time looking at Eta Carina last night.
How much better with a 2" 0III filter ...:confuse3:

[rumples riot]

This is a great shot, very impressive shot. Only criticism is that you need to up the contrast and drop the brightness out of the shot. Great stuff.

[xstream]

Awsome shot tornado33

gaa_ian the wife has an Astronomiks OIII F/T it's worth it's weight in gold on some Nebulae as you can see by tornado33's shot.
Money well spent.

[tornado33]

Thanks people :)
Yes that is Amp glow, that wasnt fully removed with flat fielding, as it was not a cold night and was a fair bit of dark noise and amp glow. Some more shots I took last night.
A shot of Eta Carina this time with a Lumicon Deep Sky filter, and better focus. http://www.users.on.net/~josiah/temp/etadeepsky.jpg
Also NGC 2467 http://www.users.on.net/~josiah/temp/ngc2467deepskys.jpg
Looking fowards to winter nights, less amp glow and thermal noise :) Normally I use either shorter exposures or lower ISO speeds, but the filter factor requires me to triple exposure times. The Cometracker 6 inch f3.6 Schmidt Newtonian was a very inexpensive scope when it was out, sold as tube assembly only. Sadly Meade discontinued them, though there is a 6 inch LXD model I believe, though sold as a complete scope and mount.

[rumples riot]

Very impressive latest shot. Very good work, must get one of those filters myself. Congratulations on a great shot.

[Robby]

Very nice T33.. Have you tried doing dark frame subtraction. I find it works wonders on amp glow and general noise...
Basically I take 9 images at same ISO setting and exposure time with lens cap on. Then average the lot of them.
Subtract that from each raw image before stacking. I use photoshop to do everything, but the more dedicated astro imaging programs do it for you.
Cheers

[[1ponders]]

That is a wicked second EC tornado.

[iceman]

T33, can you please resize your images before posting them, or have a link to the images on your webspace, warning people how big they are. A couple of them are almost 200k and we still have quite a few dialup members.

The image guidelines are ~60k 800x600.

Thanks

[Vermin]

I overlayed the images in Photoshop and aligned them so I could do a blink comparison between the two filters. The most obvious thing visible though was the improved focus of the second image, much sharper (and I'm not knocking the first one - I still think it's fabulous).

[tornado33]

No worries, images now downsized.
Heres a deep shot taken without a filter, its a stack of four 200 second ISO 400 shots, stacked, dark subtracted and flatfielded with registax 3, and stretched with photoshop.
http://www.users.on.net/~josiah/temp/etaunfilteredsmall.jpg

[cometcatcher]

They're all good. I'm not sure which one I like best.