From: Dale J Martin <dale@massapoag.org>

Date: October 7, 2008 8:27:59 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Heart Nebula

Hi Milton,

I'm glad you like it..... this image would not have been possible if not for Astro IIDC!

On Oct 7, 2008, at 6:27 PM, Milton Aupperle wrote:

Hi Dale;

Very nice image, thanks for sharing. I wasn't aware of the Heart Nebula at all, and it's only a bit above the double open cluster in Perseus too. I'll add it to my list of targets for this winter.

A couple of questions.

- What was the original image resolution (xxx by yyy pixels) from the camera?

The Canon 350D has a sensor size of 22.2 x 14.8 mm at a resolution of 3456 x 2304.

- Are you shooting Bayer RAW, TIFF or JPEGs?

Bayer RAW

- Are you averaging or summing the 60 images when you stack to create the work image?

I'm using Nebulosity for stacking and I believe Craig is summing.

- In your information on the site (great to see some details on what your using and doing) it says your using a "Astronomik CLS Filter". I take it that really helps eliminate the light pollution at your location?

The Astronomik  CLS Filter made a big difference in my imaging.... it really does work.

- How light polluted are your skies (i.e. what sort of background is your DSLR camera picking up for 6 minute exposures) and how deep can you see visually?

I am 30 miles west of Boston, MA and I have 2 cities 2 miles west of me, I image mostly to the northeast since this is my darkest skies. I can send you some raw images with and without the filter if you want.

Regards,

Dale

Thanks in advance..

Milton J. Aupperle

On 6-Oct-08, at 6:29 PM, Dale J Martin wrote:

Hi folks,

Here is another image of the Heart Nebula with 60 frames at 6 minutes each. I this the first image I have taken using the Bahtinov Mask, I think this is my best focus to date.

htt