Image of the day

From the
ATWB Customer Gallery

Elephant's Trunk Nebula IC1396

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Dave Erickson

September 10, 2015 08:46 AM Forum: Telescope Making

September 16, 2015 09:32 AM Forum: CCD Imaging and Processing/Deep Sky

G 132.7+1.3, LBN 641

Posted By Dave Erickson

Maciej Kapkowski said:

Inspired by Dave Erickson's photo I made nearly the same, but in colour.

Full res: http://cdn.astrobin.com/images/thumbs/5de0156d71f896c103307bb8f232850b.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright%20Maciej%20Kapkowski.jpg

Thanks for looking!

Maciej


Maciej, Beautiful image ... I have several hours of narrow band data. If you'd like to add it to your image let me know...

September 16, 2015 12:37 PM Forum: CCD Imaging and Processing/Deep Sky

2nd processing for NGC-7822

Posted By Dave Erickson

I like them both, the first seems to have a bit more contrast and less blue...

September 23, 2015 11:48 AM Forum: CCD Imaging and Processing/Deep Sky

G 132.7+1.3 with OIII data

Posted By Dave Erickson

Hi Marciej,
Looks good!!
Best,
Dave

October 15, 2015 07:03 AM Forum: CCD Imaging and Processing/Deep Sky

Flats, Darks, and light leaks

Posted By Dave Erickson

Hi Roger,
You should work to eliminate sources of stray light, if you can see it with a flashlight its an issue. The sources you describe will be variable during light frame exposures and flats. This will cause variations in the background from frame to frame as the telescope position changes during your imaging session, and from night to night as you image more difficult objects.

While there are sophisticated algorithms to reduce the impact of random nonuniform illumination sources, Signal to Noise is always traded and adversely impacted. In astro imaging its all about bringing out details, signal, as close to the noise as possible.
Regards,
Dave

October 15, 2015 07:16 AM Forum: CCD Imaging and Processing/Deep Sky

Stephan's Quintet

Posted By Dave Erickson

Hi Roland,
Beautiful image...
Regards,
Dave

October 18, 2015 11:01 AM Forum: CCD Imaging and Processing/Deep Sky

M33 for October 2015

Posted By Dave Erickson

Hi Floyd,
I like it, looks like a very successful imaging run...

Dave

October 19, 2015 01:19 PM Forum: CCD Imaging and Processing/Deep Sky

November 22, 2015 11:30 AM Forum: CCD Imaging and Processing/Deep Sky

Melotte 15

Posted By Dave Erickson

Hi Floyd,
Definitely worth the considerable effort! That is a beautiful image!
Dave

November 24, 2015 07:03 PM Forum: CCD Imaging and Processing/Deep Sky

Two Popular Objects with a little known Super Nova

Posted By Dave Erickson

Floyd, Eric, Roland... Thanks!...
Here is just the HAlpha data...