M57 at almost full moonPosted By Steve Mathis |
Well, that seems up to par with lots of the other great shots! Very cool!
Posts Made By: Steve Mathis
October 7, 2007 12:44 AM
Forum:
CCD Imaging and Processing/Deep Sky
October 28, 2007 04:54 PM
Forum:
After Dark
Holmes Sunday MorningPosted By Steve Mathis |
I just installed DeepSkyStacker on my computer, and used it to combine 5, 10 sec (ISO 400) images. Here is the result. Thanks for looking!
Steve
Steve
November 16, 2007 11:29 PM
Forum:
CCD Imaging and Processing/Deep Sky
M31 with 200mm Micro NikkorPosted By Steve Mathis |
Very nice! What camera?
thanks!
Steve
thanks!
Steve
November 19, 2007 04:55 PM
Forum:
CCD Imaging and Processing/Solar System
Blue light on Mars! 11/18/07Posted By Steve Mathis |
Hey! I may have captured the same thing Sunday morning at about 6:00 AM CST...my photo is not in the same league as Dan's but it does show the bright spot in the polar cap.
Steve
Steve
December 22, 2007 12:11 AM
Forum:
After Dark
Winter SolsticePosted By Steve Mathis |
Rey, in your first sentence you write "the sun rises at a later time for a few days after sunrise"....
This isn't what you meant to say is it? I think I know what you are talking about. Although the solstice is the shortest day, sunrise on the solstice is not at its latest point. This is true, and is a consequence of our elliptical orbit and related changing orbital speed, and the tilt of the ecliptic relative to the celestial equator. The latest sunrise for mid-latitudes in the northern hemisphere occur around the middle of January. A good link for more detail is
http://www.dlmcn.com/eqntime.html
This is kind of tough to get your mind around!
Steve
This isn't what you meant to say is it? I think I know what you are talking about. Although the solstice is the shortest day, sunrise on the solstice is not at its latest point. This is true, and is a consequence of our elliptical orbit and related changing orbital speed, and the tilt of the ecliptic relative to the celestial equator. The latest sunrise for mid-latitudes in the northern hemisphere occur around the middle of January. A good link for more detail is
http://www.dlmcn.com/eqntime.html
This is kind of tough to get your mind around!
Steve
December 29, 2007 11:12 PM
Forum:
Birding Optics and Photos
Red-tailedPosted By Steve Mathis |
That is a beauty! Nice job!
Steve
Steve
January 15, 2008 06:28 PM
Forum:
Birding Optics and Photos
Young Cooper's Hawk again...Posted By Steve Mathis |
Here is a cropped, close up of the previous one. I am thinking (I was told...) this is a Cooper's Hawk. Anyone for sure?
January 17, 2008 12:01 PM
Forum:
SCI-FI
Best Science Fiction novelist ever?Posted By Steve Mathis |
Robert Heinlein
January 24, 2008 04:42 PM
Forum:
Telescope Making
Sticker Unsticking and RestickingPosted By Steve Mathis |
Depending on what the sticker is made of, a heat gun or hair dryer might work to soften the adhesive, allowing you to safely peel it off.
January 28, 2008 11:50 PM
Forum:
Digital SLR AstroPhotography
Dumb question of the day - Eclipse/D80/C-11Posted By Steve Mathis |
Not a dumb question at all. At f/6.3 the focal length of the 11" is about 69 inches. A pretty good rule of thumb for the size of an image of the full moon is that the image diameter is about 1/100th of your focal length. So on your 11" f/6.3 the image will be around 0.7" or 18mm. If you know the size of your camera's sensor, you can determine if the lunar image will fit.
Or, you can hook the camera up at, say, first quarter, and if the lunar image fits across the frame, well, there you go!
Steve
Or, you can hook the camera up at, say, first quarter, and if the lunar image fits across the frame, well, there you go!
Steve
Funding Member
