Go Back   IceInSpace > Images > Deep Space
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 12-04-2011, 10:18 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
QHY8L First Light at Coonabarabran

Hello,

I upgraded from a DSLR to a QHY8L ccd camera December last year.

My first proper imaging session was 3 nights at Coonabarabran in March.

I have a long way to go with my processing, especially with colour and saturation. However, I am happy with these images...what do you think?

WO M110 refractor
Heq5Pro mount
QHY8L ccd
PHD guiding with WO 66mm guide scope
WO FFII focal reducer
Televue 2x Powermate

Processing with DSS and Photoshop

Thanks for looking.


Ross.
Attached Thumbnails
Click for full-size image (CentA.jpg)
207.0 KB185 views
Click for full-size image (EtaC.jpg)
219.2 KB176 views
Click for full-size image (horseHead.jpg)
206.5 KB211 views
Click for full-size image (HorseHeadEXP.jpg)
177.3 KB181 views
Click for full-size image (M83.jpg)
195.1 KB166 views
Click for full-size image (OmegaC.jpg)
208.8 KB146 views
Reply With Quote
  #2  
Old 12-04-2011, 10:38 PM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,429
for a first go they are quite a treat! a tad green in some but like you my processing need work - lots of practice. you setup looks like its matched well. be great to see what you get in the future, and the repros
Reply With Quote
  #3  
Old 13-04-2011, 08:22 AM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Ross, I'm speechless mate. What a set! That HH is incredibly deep, superb Eta and the rest just awesome. The processing is very good too. I bet you're happy with that lot hey? Very productive night.
Reply With Quote
  #4  
Old 13-04-2011, 08:24 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Great body of work! I agree with Dave about the green tinge, but this work laptop screen is terrible for viewing images so it could be me
Reply With Quote
  #5  
Old 13-04-2011, 05:34 PM
atalas's Avatar
atalas
Registered User

atalas is offline
 
Join Date: Mar 2005
Location: Sydney
Posts: 5,151
Number 3 HH for me....nice work !
Reply With Quote
  #6  
Old 13-04-2011, 09:21 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Hello all,

Mike, David, Louie, thank you for your advice and encouragement.

Marc, I am very happy with these images. It is your freely available and excellent advice and your constant praise and encouragement that has been of great help.

Colour is a big problem for me. Everything else is relatively easy in comparison! I could do 10 different colour/saturation versions of an image and then the next morning be happy with none! Maybe monochrome Ha is my calling!

I am very happy with the upgrade from a DSLR to a CCD. I am getting colour in stars that used to come out white with the DSLR and the noise is so much less. I have a long way to go, but I am feeling confident.

Thanks.

Ross.
Reply With Quote
  #7  
Old 13-04-2011, 10:14 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Mate, it's your dedication and perseverance paying off dividends big time now. You're well on your way. Well done.
Reply With Quote
  #8  
Old 13-04-2011, 11:05 PM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 18,185
Some great images there.

The green tinge in the background is quite common in astro images. Noise is often green. Especially if there was any light pollution around.

Try this free plugin from Rogelio Andreo:

http://blog.deepskycolors.com/archiv...sta-green.html

It essentially does the job of the Tony Hallas green pixel gun but is all automated. It can tart up a greeny image very nicely. Got watch overdoing it as sometimes it can degrade an image slightly. So definitely do a copy first and use the plugin on the copy in case you want to backtrack.

The first HH is the better, the 2nd is a bit oversaturated.Also a bit too much magenta. The first HH only has a bit of background green which the above should handle.

The Eta has a background colour problem. I see this sometimes on my images occassionally. I am still not 100% sure what goes on with that sometimes but if you split the RGB and processed them slightly differently and recombined them later it may cause that.
With my images it usually means the green or blue component is noisy or had some high cloud in it or moon.


Greg.

Greg.
Reply With Quote
  #9  
Old 14-04-2011, 07:16 PM
RickC (Richard)
Registered User

RickC is offline
 
Join Date: Jan 2010
Location: Sydney NSW
Posts: 138
Ross
what a fab collection of images
I've noticed that some have picked up on a little green, don't
worry I can show you some real green
and I've found a good fix........

see you in Coonabarabran
Reply With Quote
  #10  
Old 14-04-2011, 08:33 PM
telecasterguru's Avatar
telecasterguru (Frank)
Have scope will travel!

telecasterguru is offline
 
Join Date: Jan 2009
Location: Pitnacree NSW
Posts: 1,501
Ross,

I am very impressed.

Fabulous work.

Frank
Reply With Quote
  #11  
Old 14-04-2011, 09:01 PM
DJ N
Registered User

DJ N is offline
 
Join Date: Jul 2006
Location: Adelaide, South Australia
Posts: 423
Excellent stuff Ross. Very impressed with the images. Just wondering if you recall what length subs?

Cheers,

Daniel
Reply With Quote
  #12  
Old 14-04-2011, 10:00 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Hi Greg,

Thank you for your advice. I tried the plugin and wow! Comparing before and after images, the difference in the green was very obvious. It has improved all my current images from the trip.

I see I have a lot of reading and experimenting with colour ahead of me.
I have attached my Eta C shot after applying the plug in.

Richard,thanks for the " boo boo faces". I know it must have been very difficult for you!
See you in Coonabarabran where it definitely will be very green and also very dark.

Ross.
Attached Thumbnails
Click for full-size image (EtaHLVG.jpg)
220.3 KB79 views
Reply With Quote
  #13  
Old 14-04-2011, 10:03 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Thanks Frank.

Thanks Daniel. I used 6 subs at 10 minutes each.

Ross.
Reply With Quote
  #14  
Old 17-04-2011, 11:32 AM
Hagar (Doug)
Registered User

Hagar is offline
 
Join Date: Oct 2006
Location: Australia
Posts: 4,646
Very nice collection Ross. You have to be happy with images like these.

Well done.
Reply With Quote
  #15  
Old 17-04-2011, 12:25 PM
richardo's Avatar
richardo (Rich)
Love reflection Nebs !

richardo is offline
 
Join Date: Aug 2006
Location: Streaky Bay
Posts: 1,070
Great job on all counts here Ross.
You're climbing the dedicated ccd curve very quickly indeed.
Well done.
As others have pointed out, yes the dreaded green monster... ah it's such a fine line.
Also, while you're going, start taking flat fields, this will definitely help with uneven field illumination with your chip.

On a whole you've done extremely well.

Rich
Reply With Quote
  #16  
Old 18-04-2011, 07:50 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Thank you Doug.

I am happy with them.
It was such a big step moving up from a DSLR. Things I took for granted like a viewfinder, SD card storage and battery power were no longer there.
I now had to deal with FITS files, flats, bias and dark frames.
However, to see the low noise and star colours in these initial photos more than makes up for the loss of convenience and makes me want more.

Thanks.

Ross.
Reply With Quote
  #17  
Old 18-04-2011, 07:57 PM
Ross G
Registered User

Ross G is offline
 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Hi Rich,

Thank you for you encouraging comments.

Yes, I can see learning to use the CCD is going to take my astro photos to a new level.
I did take flat and bias frames. they did even out the illumination as the field flattener I used had a lot of vignetting. However, they did introduce an unfavourable colour cast. I am currently trying to work out what I did wrong.
However, even at this early stage I am getting better photos than with my DSLR.

Thanks.

Ross.
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 01:37 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Astrophotography Prize
Advertisement