Great images Ross! Looks like you've had instant success with the Ha filter. It does amazing things from light polluted locations. You've got a sizable field in these too. What's the focal length?
The amount of details in the filaments of the Horse head are fantastic....
Keep at it, there is some slight coma on the ETA shot on the stars near the edge of the field, something I think a field flattener fixes if I am not mistaken...? EDIT: Hmmm, seems you have a FFII, was it used?
Otherwise, try Startool's repair module, and gently nudge those pesky stars back into shape
SOOO much detail in Ha, you might have made me seriously consider an Ha filter to be added to my shopping list....my LP is horrid here in Kellyville Ridge.
Great images Ross! Looks like you've had instant success with the Ha filter. It does amazing things from light polluted locations. You've got a sizable field in these too. What's the focal length?
Thanks Graeme,
Yes, the Ha filter has turned my light polluted backyard into a "dark site".
The Rosette and Eta C were shot at the telescopes native focal length of 660mm. The Horse Head was shot with the focal reducer/flattener attached which reduces the focal length to about 500mm
The amount of details in the filaments of the Horse head are fantastic....
Keep at it, there is some slight coma on the ETA shot on the stars near the edge of the field, something I think a field flattener fixes if I am not mistaken...? EDIT: Hmmm, seems you have a FFII, was it used?
Otherwise, try Startool's repair module, and gently nudge those pesky stars back into shape
SOOO much detail in Ha, you might have made me seriously consider an Ha filter to be added to my shopping list....my LP is horrid here in Kellyville Ridge.
Cheers
Chris
Hi Chris,
Thanks for your kind and encouraging comments.
You do have a sharp eye. The Rosette and Eta C were shot without the focal reducer/flattener, therefore the coma. The Horse Head shot was with the reducer/flattener.
I was pleasantly surprised at how much detail the Ha filter produces. Your not too far from where I live at Cherrybrook so we have similar weather and pollution. A Ha filter would be a worthwile purchase.
Looking ok to me ross. Horse is a little noisy down the bottom but more exposures would fix that.
Thanks Robin, glad you like the photos.
The Horse Head was 9 x 20min exposures so it could do with more exposures to improve the faint details.
Quote:
Originally Posted by mill
Nice first light images Ross with plenty of detail.
Thanks Martin, glad you like them.
Ross.
Quote:
Originally Posted by Lester
Wonderful views from Sydney location, the contrast in the Horse Head almost makes me want a Mono CCD.
All the best.
Hi Lester,
Thank you.
I was hesitant to buy the QHY9 as it has only been a year since I got my first ccd camera, an OSC QHY8L. However, it has far exceeded my expectations and I have no regrets. In fact, I wish I had bought it a year ago instead of the QHY8L.
I am wondering as to why you have reflections around the brighter stars. This is particularly evident in the horse image. I use a similar setup (ie WO FLT110 and QHY9) and I don't get the reflections.
Also you may need to play with your chip to flattener distance to get a flatter field.
I am wondering as to why you have reflections around the brighter stars. This is particularly evident in the horse image. I use a similar setup (ie WO FLT110 and QHY9) and I don't get the reflections.
Also you may need to play with your chip to flattener distance to get a flatter field.
Hi Rob,
Glad you like the photos.
Thanks for the advice. I haven't gotten around to experimenting with the chip to flattener distance. If there's a chance of improving the quality I'll certainly try.
The reflections could just my scope. Mine is the WO Megrez 110. It is my first telescope. It's only a doublet 110mm and being F5.95, I think the designers were really pushing things.
Superb shots Ross. Really cool. 
