tag:blogger.com,1999:blog-7479531321721277158.post4657310153090876683..comments2023-11-05T03:06:22.637-08:00Comments on VisualUniverse: Comet LulinVisualUniversehttp://www.blogger.com/profile/07384037047715300097noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7479531321721277158.post-46429137170066274612009-02-26T19:57:00.000-08:002009-02-26T19:57:00.000-08:00Hi Don,My email addr is pj@visualuniverse.org, but...Hi Don,<BR/><BR/>My email addr is pj@visualuniverse.org, but I have a catch-all that should have fwded your email to me. Sorry about that.<BR/><BR/>The ST-10 is an excellent camera. I have had the opportunity to borrow one on several occasions and really enjoy it. <BR/><BR/>I've been bombarded by questions asking about the processing technique. Funny thing is, on Sunday evening when I started playing with the data, I was shocked to see just how good it was, so I spent the next 5 hours working on it. At around 2:21am CST, I finally called it quits and had to be happy with the result. <BR/><BR/>Now for me to go back and reconstruct the exact steps I took at that late at night would be difficult. I was shooting at a very wide-angle, which allows for some comet movement tolerance. The core is elongated because of the movement, but I used curves to de-emphasize the core and bring out more of the tails.<BR/><BR/>I see you like narrowband imaging. Have you submitted your work on CloudyNights.com CCD thread to gain feedback?<BR/><BR/>-PhilVisualUniversehttps://www.blogger.com/profile/07384037047715300097noreply@blogger.comtag:blogger.com,1999:blog-7479531321721277158.post-82099592514257209012009-02-25T17:52:00.000-08:002009-02-25T17:52:00.000-08:00Phil,I tried to e-aml you, but mail sent to phil@v...Phil,<BR/><BR/>I tried to e-aml you, but mail sent to phil@visualuniverse.org is rejected.<BR/><BR/><BR/>I love your Lulin image.<BR/><BR/>I notice that you said you had LRGB = 48 minutes.<BR/><BR/>I’m wondering if you would share a few more details,<BR/><BR/>How long was each sub-frame and how many of each channel did you use?<BR/><BR/> <BR/><BR/>I do some narrowband imaging myself, just hobby level stuff.<BR/><BR/>http://theatomiccafe.com<BR/><BR/>Most recent stuff is here…<BR/><BR/>http://theatomiccafe.com/dso2.htm<BR/><BR/> <BR/><BR/>I was out shooting the Rosette with a camera lens and ST10 on Saturday.<BR/><BR/>I put in 45 minutes on Lulin, because I had the opportunity, but I didn’t take any Luminance and I had to use H alpha for the red channel.<BR/><BR/>(My color filter wheel only holds 5 filters, I had Ha, SII and OIII in the first 3 slots, full spectrum blue and green in the other 2.)<BR/><BR/> <BR/><BR/>Anyway, comets aren’t really my specialty but I’ve enjoyed the processing challenge and I’d like to learn more.<BR/><BR/>It appears that you probably stacked and processed the background stars and comet separately and then married the two together.<BR/><BR/>There are a couple of ways that I know of to perform that step.<BR/><BR/>I’m curious how you did that as well.<BR/><BR/> <BR/><BR/>Thanks for your time and for posting your wonderful images.<BR/><BR/> <BR/><BR/>-DonUnknownhttps://www.blogger.com/profile/08267256704705725462noreply@blogger.com