Deconvolution for PhotoshopPosted By Steve Mathis |
Louie, thanks for the time and effort you have put into these tutorials! They are a treasure.
Posts Made By: Steve Mathis
December 24, 2010 12:50 PM
Forum:
CCD Imaging and Processing/Deep Sky
January 9, 2011 04:01 PM
Forum:
Insects - Flowers and Other Small Stuff - Photos
Frost FlowersPosted By Steve Mathis |
The stem that produced this is at the bottom...
January 21, 2011 04:36 PM
Forum:
CCD Imaging and Processing/Deep Sky
M31 MosaicPosted By Steve Mathis |
WOW! That is gorgeous, Jim. Great color, very nice stars. The H-alpha regions, the core detail, the seamless mosaic, all superb. A lot of work, but well worth it!
February 9, 2011 02:30 PM
Forum:
Eyepieces
Baader HyperionsPosted By Steve Mathis |
Hey, Billy. I have six Hyperions...
3.5, 5, 8 13 17 and 21mm. I use the 8, 13, and 21 most frequently. The 3.5 rarely, but when seeing allows it works well. All have a nice wide field. The color correction is good, but not spectacular, especially at the field edge.
As for filters, these eyepieces (when used in their standard configuration) would use 1.25" filters. The design allows them to fit either 1.25" or 2" focusers. The 1.25" barrel can be removed (along with the field lens) making the eyepiece longer in effective focal length, widening the field, and requiring a 2" filter. The edge correction in the "wide" configuration is not as good, and I rarely do this.
3.5, 5, 8 13 17 and 21mm. I use the 8, 13, and 21 most frequently. The 3.5 rarely, but when seeing allows it works well. All have a nice wide field. The color correction is good, but not spectacular, especially at the field edge.
As for filters, these eyepieces (when used in their standard configuration) would use 1.25" filters. The design allows them to fit either 1.25" or 2" focusers. The 1.25" barrel can be removed (along with the field lens) making the eyepiece longer in effective focal length, widening the field, and requiring a 2" filter. The edge correction in the "wide" configuration is not as good, and I rarely do this.
February 14, 2011 10:37 PM
Forum:
Digital SLR AstroPhotography
Nikon D80, Software to use?Posted By Steve Mathis |
Hey, Paul...
You "should" be in the DSLR forum, but nobody around here would get bent out of shape over which forum you post in. Besides, this forum needs the participants!
I'm not sure what you want to do that would necessitate hooking your camera to a computer for doing photography. Does the D80 have "live view"? If not I don't think there is that much a computer will do that can't be done another way. What are you wanting (the computer) to do?
You "should" be in the DSLR forum, but nobody around here would get bent out of shape over which forum you post in. Besides, this forum needs the participants!
I'm not sure what you want to do that would necessitate hooking your camera to a computer for doing photography. Does the D80 have "live view"? If not I don't think there is that much a computer will do that can't be done another way. What are you wanting (the computer) to do?
February 26, 2011 11:34 AM
Forum:
N.A.S.A.
Mission STS-133Posted By Steve Mathis |
Wow, what a great adventure! I am so jealous! Thanks for sharing these, Ivan.
Steve
Steve
March 10, 2011 12:57 PM
Forum:
CCD Imaging and Processing/Deep Sky
OrionPosted By Steve Mathis |
Wow! Great work, Jim. There is so much H-a there it is almost unrecognizable! I've never seen anything like this.
March 19, 2011 10:35 AM
Forum:
CCD Imaging and Processing/Deep Sky
18 hour Orion and Barnards Loop mosaicPosted By Steve Mathis |
Really spectacular! Well worth the time and effort!
April 5, 2011 10:43 AM
Forum:
Solar System Observing
Solar Projecting ViewerPosted By Steve Mathis |
Alex, I used a 10" f/5.6 Newt for that purpose for a long time when I taught Astronomy. I used an ancient "army surplus" eyepiece, and could project an image 10" or 12" across onto a shaded screen. The eyepiece would be my only concern, although I never noticed my old eyepiece getting hot. When I would do this for a class, I would blacken a small piece of paper with pencil lead, and hold it near the eyepiece when pointing toward the sun. It would immediately catch fire, demonstrating the need to keep eyes away from there! Once (and only once) I was giving a brief introductory talk about what we were doing, with the scope pointing away from the Sun. One of the kids piped up with "Hey Mr. Mathis, should smoke be coming out of the telescope?"...turns out that I wasn't point quite far enough away from the Sun, and the light was hitting the inside of scope. No actual fire, but... 8)
Steve
Steve
April 5, 2011 10:46 AM
Forum:
Digital SLR AstroPhotography
M 101Posted By Steve Mathis |
Thanks, Robert!
Funding Member
