NGC6559 in Ha

multiweb (Marc) · #1 25-10-2010, 06:15 PM

Here's my last one from that Friday night. Only 6x10min. It was a real bummer because I was getting some nice details inside the bright nebulae parts but the clouds rolled in and cleared at 10:00pm by then it was too low.

So spades of noise in the dark bits. Still holding ok for 1h though. Hope you like it. Just squint your eyes and the noise will go.

strongmanmike (Michael) · #2 25-10-2010, 06:47 PM

Even without the squint filter it looks ok Marc

Nice field there, is the edge abberation a collimation issue do you think..? Or field rotation. I imagine these FARSTARs are a bugger to get just right?

I am expecting the worst in this department when the F3.8 Orion astrograph arives too

Mike

multiweb (Marc) · #3 25-10-2010, 07:12 PM

Hehe... too kind mate. Now you can go rinse your eyes with all that sand you coped in them

Yup! Field rotation on 10min subs. I'll never learn.

Thought I'd get away with it though. I must be waaay off...

Hagar (Doug) · #4 25-10-2010, 07:13 PM

Very nice Marc, with that field you could almost fit lagoon into the image as well. It's a busy area which does come alive when you add a bit of OIII to the Ha.

Nice one.

multiweb (Marc) · #5 25-10-2010, 07:45 PM

Quote:

Originally Posted by Hagar

Very nice Marc, with that field you could almost fit lagoon into the image as well. It's a busy area which does come alive when you add a bit of OIII to the Ha.

Nice one.

Thanks Doug. Yes that's the plan. Although it's getting low quickly now.

gregbradley · #6 25-10-2010, 07:59 PM

Thats a very good image Marc. You've produced a string of really good Ha images with that setup.

Greg.

multiweb (Marc) · #7 25-10-2010, 08:22 PM

Quote:

Originally Posted by gregbradley

Thats a very good image Marc. You've produced a string of really good Ha images with that setup.

Greg.

Thanks Greg. I'm glad you liked that one. Not my best shot.

strongmanmike (Michael) · #8 25-10-2010, 11:05 PM

Quote:

Originally Posted by Hagar

Very nice Marc, with that field you could almost fit lagoon into the image as well.

Nooooooooooooooo

...right, I'm going to post another version of that blasted Helix then

multiweb (Marc) · #9 25-10-2010, 11:06 PM

Quote:

Originally Posted by strongmanmike

Nooooooooooooooo

...right, I'm going to post another version of that blasted Helix then

Now you make me wonder what the center of M8 might look like in Oiii only?

allan gould · #10 25-10-2010, 11:10 PM

Nice one Marc as I really enjoyed the detail and sharpness of the image

multiweb (Marc) · #11 26-10-2010, 08:40 AM

Quote:

Originally Posted by allan gould

Nice one Marc as I really enjoyed the detail and sharpness of the image

Thanks Allan. Due to re-shoot and add to this one tonight. See what comes out of it.

CraigS · #12 26-10-2010, 02:15 PM

Marc;

I don't know how you do it but everytime I stare into one of your images, I feel like I'm floating around in it.

The quality is outstanding … did you use that 5" newt for this one, also ?

I'm really looking forward to the next instalment.

Thanks so much for sharing. I don't know much about edge abberation due to field rotation, but I do know that I'm my worst critic .. give yourself a pat on the back !

Tremendous work, mate.

Cheers

TheAstroGuy (Shane Ross) · #13 26-10-2010, 02:28 PM

Marc,

These Ha images you are producing with your rig are fantastic, the Horse was superb and now this superb piece of imaging magnifique.

How are you finding the time to get such great images under the stars

i don't know but i Like It

marco (Marco Lorenzi) · #14 26-10-2010, 03:53 PM

Nice one Marc, I would have chosen a different framing but it is pretty nice

Clear Skies
Marco

multiweb (Marc) · #15 26-10-2010, 04:52 PM

Quote:

Originally Posted by CraigS

Marc;

I don't know how you do it but everytime I stare into one of your images, I feel like I'm floating around in it.

The quality is outstanding … did you use that 5" newt for this one, also ?

I'm really looking forward to the next instalment.

Thanks so much for sharing. I don't know much about edge abberation due to field rotation, but I do know that I'm my worst critic .. give yourself a pat on the back !

Tremendous work, mate.

Cheers

Thanks Craig.

No I don't use the newt for this. It would take a lot longer to do the same. I use an hyperstar lens that converts my C11 F/10 down to F/2. So you get 11" aperture for approx 500mm FL. 30s on that rig will collect the same a mount of photons that my 5" newt would collect in 15 min. That allows me to collect a lot of subs of various objects in very little time. One of the problem is that the FOV is pretty big so when you expose for 10min if your polar alignment is not reasonably close you'll end up with field rotation centered on the star you use for guiding. Using an hydrogen alpha filter will make things worse as it produces pinpoint stars so there's not enough blurriness to cheat

Another issue is focus. The CFZ is pretty tiny at F/2. But it's all part of the fun.

Quote:

Originally Posted by TheAstroGuy

Marc,

These Ha images you are producing with your rig are fantastic, the Horse was superb and now this superb piece of imaging magnifique.

How are you finding the time to get such great images under the stars

i don't know but i Like It

Thanks a lot for the enthusiastic feedback Shane.

I actually got lucky lately picking my nights that's all. I, like everybody else haven't been imaging for a while due to non cooperating weather fairy in NSW. I think she's moved to Melbourne TBH

.

Quote:

Originally Posted by marco

Nice one Marc, I would have chosen a different framing but it is pretty nice

Clear Skies
Marco

Thanks Marco. I know what you're saying but to keep Mike S.' sanity I try to avoid any representation of M8 in any shape or form including crops. Long story.

Only kidding Mike.