Image of the day

Captured by
RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Steve Mathis

May 8, 2011 06:43 PM Forum: My Favorite WIMP.COM or YOUTUBE.COM

Dog thinking about food

Posted By Steve Mathis
It is a great one. The voice actually seems befitting for the look on the dog's face! Reverse-lip-synching a dog takes some doing!

May 13, 2011 04:44 PM Forum: AstroMart FAQ

Resizing a JPEG pic

Posted By Steve Mathis
Do you have a version of Photoshop? If you do, I can lead you through the process with that. If not, you could get something like Irfanview (it is free, not too big, and easy to use). Photoshop has a "Save for Web" feature that lets you reduce the file size of a JPEG without turning it into a thumbnail. Let me know.

May 21, 2011 05:07 PM Forum: My Favorite WIMP.COM or YOUTUBE.COM

Oscillations, you do the math

Posted By Steve Mathis
Wow. I love physics.

June 9, 2011 10:56 PM Forum: ASTRONOMY

New Supernova in M51

Posted By Steve Mathis
I got this image on the night of Wed. June 1. I hadn't heard about the supernova. I believe I captured it! This was taken through a 6" f/4 Newt. I was really just testing it to see if I had solved some problems it was having.

June 13, 2011 06:40 PM Forum: Digital SLR AstroPhotography

M 51 with SN

Posted By Steve Mathis
Thanks, Harry. That was a 1600 x 1200 crop out of the middle of a 3000 x 2000 frame. I reduced the 1600 to 800 to post it here. I guess the Nikon will remain in action until it wears out! Here is a reduced-size version of the full frame.

June 16, 2011 02:53 PM Forum: Off Topic Discussions

Google Eclipse Widget...

Posted By Steve Mathis
Good catch, Bill!

June 23, 2011 09:23 PM Forum: ASTRONOMY

Re: man made satellites

Posted By Steve Mathis
I've had satellites cross through my field of view more time than I can remember. If you try to get images of the sky, it is almost guaranteed! smile

June 24, 2011 02:59 PM Forum: Deep Sky Observing

Re: north america nebula

Posted By Steve Mathis
It is a good binocular target under dark skies, pretty easy really. I've also seen it with a 6" f/4 Newt, without a filter.

July 9, 2011 06:14 PM Forum: CCD Imaging and Processing/Deep Sky

Modified DSLR Imaging

Posted By Steve Mathis
Hey, Kevin. My understanding is that the stock IR filter cuts off too far up into the red part of spectrum, effectively blocking H-α emissions. The replacement IR/UV filters go deeper into the red, capturing the H-α, but still blocking the longer IR, and short UV. Even your APO will be unable to bring these longest and shortest wavelengths to focus (essentially chromatic aberration). My D50 was modified with a clear glass replacement, and requires the external IR/UV filter for any refractive optics. Used with a purely reflective system (like a Newt with no coma corrector) it could be used without a filter, since reflection does not cause dispersion. Make sense?

July 11, 2011 08:05 PM Forum: Digital SLR AstroPhotography

Simple night snapshots

Posted By Steve Mathis
Cool stuff!

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