Inspired by Ross' photos I started doing exposures on the barnard loop in Ha last Saturday. My first with a 18-35 Pentax lens. Still new to this lens business so bear with me on this one. I didn't realise how wide the field was and I took a good hour of my house roof until it cleared completey and I started picking up what I believe might be the rosette nebula at the bottom. Well half of it.
Seems I got the focus right. Beginner's luck? Did it on Jupiter with a mini-bathinov mask bought right here on IIS from a member. Works real good.
So this is 10x900s. Guided through the ED80 and piggy backed on my G11. Bit of dew on the lens on the last subs and still very noisy. Warmish night but I reckon with a bit more practice and data I should make something out of it.
Big one here. (800kb - had to crop the roof off so this is probably 75% of original frame)
You can see the Barnard Loop in Ha, thats good. The Skydrive thing you got going there for your pics is also good, very good, nice work, havent seen that before.
Impressive Marc. 2.5hrs data @ a fast focal ratio, I was perhaps expecting more detail to be extracted out of the starry background. Huge FOV however which makes it an awe inspiring scene. Well done.
Very nice Marc, you make it sound like it was an experiment and if so it worked very well. The loop is probably one of the better versions I have seen.
Well done.
You can see the Barnard Loop in Ha, thats good. The Skydrive thing you got going there for your pics is also good, very good, nice work, havent seen that before.
Thanks Fred. Yeah Skydrive is free and no brainer. Easy to use.
Quote:
Originally Posted by jase
Impressive Marc. 2.5hrs data @ a fast focal ratio, I was perhaps expecting more detail to be extracted out of the starry background. Huge FOV however which makes it an awe inspiring scene. Well done.
Thanks Jase. This is a central crop of the full frame which shows part of my house roof and street lights. Messy with massive gradient across the shot as well and I didn't calibrate as I haven't figured out how to shoot flats with that lens yet. New things to learn. But you're right in saying that when done properly I should get a lot more signal for this integration time.
Quote:
Originally Posted by leon
Marc, that is some impressive work, pin point imaging, well done.
Leon
Thanks for the comment Leon.
Quote:
Originally Posted by Hagar
Very nice Marc, you make it sound like it was an experiment and if so it worked very well. The loop is probably one of the better versions I have seen.
Well done.
Thanks Doug. The center turned out ok with focus. I hope I can reproduce it consistently now .
Great shot! You have managed to really highlight Barnards Loop.
15min exposures is pretty good. Is your Ha filter 7nm or 12nm?
The field curvature is due to the zoom lens. I don't think zooming in will help. Stopping down might, but then you will lose exposure.
The best solution is go on ebay and get a 2nd hand Pentax wide angle or standard fixed focal length lens. You will get better quality and greater exposure.
Did it on Jupiter with a mini-bathinov mask bought right here on IIS from a member. Works real good.
