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Old 12-04-2010, 07:18 AM
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iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Thanks to everyone for your comments and feedback. Much appreciated. It's certainly nice to be able to post some astrophotography again.

Quote:
Originally Posted by h0ughy View Post
nice prom on the bottom, i still have to find the time to use my Lunt - you are a luck bloke mike all this "free " time
I held off getting a PST for a long time because I simply DON'T have free time during the day to use it! I'm at work (or in transit) for 12+ hours a day, so it only leaves weekends, which is difficult because of family commitments etc.
I was fortunate enough to get some time on Friday morning because I was working from home that day

Quote:
Originally Posted by Matt Wastell View Post
Nice work Mike - that big area - top left of image 1 - was interesting - a big ugly smudge on the Sun - is it a filament (seems to broad?) - it is the largest non descript Solar thing I have seen.
Thanks Matt. I was intrigued by that broad area too - I'm pretty sure it's just a big filament but on a strange angle we don't normally see.

Quote:
Originally Posted by Dennis View Post
Nice work Mike – glad to see you outdoors under the (daylight) skies enjoying yourself!

Cheers

Dennis
Thanks Dennis. It was a different experience. Quite quick and easy to setup too, which is a bonus.

Quote:
Originally Posted by mithrandir View Post
It's on image 2 also. Dust bunny?
Definitely not a dust bunny - I think it's a broad filament on a strange angle. Image 2 is just an inverted image 1

Quote:
Originally Posted by sheeny View Post
Great start Mike! Did you capture the surface detail and the proms in one shot or have you done a HDR blend? Very smooth either way!

Al.
Thanks Al. They are 2 separate exposures processed separately and blended in PS. I used about 1/20th sec (15fps) for the proms and about 1/180s (30fps) for the surface. I found during processing that some of the proms were captured even using the surface exposure - so I'll try experimenting more with the exposure and frame rate and perhaps reduce the double processing I have to do.

Quote:
Originally Posted by Troy View Post
Nice pictures Mike. I hope you sort your DMK41AF02 camera issues out.
Thanks Troy - the DMK41F issue is really annoying. I just wish I could swap the bloody thing for a USB version.

Quote:
Originally Posted by seeker372011 View Post
thats awesome

years after getting my pst i have yet to get one decent image out of it!
Thanks Narayan. Apart from focus and composition, a lot of work seems to be needed in processing to ensure a nice looking image that's not overprocessed. It can be very easy to overprocess solar images I've found.

Quote:
Originally Posted by TechnoBill View Post
Hi Mike,
Nice images. I am no expert, but I think sometimes glow looks good and sometimes its better without. I too think it often gives a more powerful look. Also I recon solar imaging is about what looks cool... yes there are those that do prefer it to be technically accurate, etc but I just like the pretty pictures and when you get one that has the Wow factor :-)
Yeh i'm not sure about technical accuracy either, but for now i'm just happy to get some nice looking pictures and will work on the rest later

Quote:
Originally Posted by TechnoBill View Post
Ummm ... scope in the sun, you in the shade

Bill D
Yes - that's what I found too. It was too hot sitting in the Sun, and I couldn't see the laptop screen to focus properly or to see if the exposure was correct.
Given a lack of hutch or observatory, my unique solution was to drag the kids trampoline right next to my mount, so I was sitting on the ground with my laptop under the shade of the trampoline. I could still reach the PST to focus it, had the hand controller next to me for composition.
So I was in the shade and it was much more comfortable Apart from having to sit on the ground, that is.

Quote:
Originally Posted by daveg View Post
welcome to the Sun Mike! Loads happening in each image.

To clear the pst "hot spot"
- apply a curves adjustment-layer and pull down the curve the required amount.
- Now "ALT click" on the mask of the curves layer (the white icon to the right)
- fill the mask with black (use the paint bucket) to hide the effect of the curves
- "ALT click" again to see the image
- now select the paint brush tool and make its colour white and "paint in" the curves effect in the hot spot
- changing the opacity adjusts the amount of the curves effect

Now unfortunately that PST looks like it may be astigmatic as the image seems a bit soft. The prism in the focusing mechanism is held on by whats effectively "pritstick glue" so goes out of alignment easily. Theres info on the www on how to fix it. best test is to use as high a power as the seeing will take and see if the image will "snap" into focus (as they do with your top quality planetary images!).

Hope this helps

DG
Thanks Dave. I reduced the hot spot somewhat but there's definitely more I could do. I was trying to find out how to create an artificial flat frame, which would even the exposure across the image. Haven't got it nailed yet but will keep practising.

I'm not sure about astigmatism. The softness could be a result of the seeing or the focus. I really didn't take the time or care needed to ensure sharp focus, and I probably stacked too many frames.

I'll definitely keep an eye on it for next time and see if it improves.

Cheers and thanks.
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