Hi Kirt; Glad you liked the images. The images were taken remotely through a telescope (a Takahashi Mewlon) and camera (a FLI-IMG 1024, Dream Machine) located at the RAS Observatory in Cloudcroft, New Mexico. (Co-located at New Mexico Skies). As for narrow band filters, two good sources are: AstroDon filters: www.astrodon.com and Custom Scientific, Inc.: www.customscientific.com/astrostand.html The specific filter for this particular Horsehead image (the close up)was not an Ha filter. The image is a RRGB image where I used the R filter for both the L channel and for the R channel. The Ha filter I use for the Narrow band is usually the AstroDon. Yes, the NASA technique was discussed a month ago in S&T. I actually like the images better using their technique of having the SII image in the Red channel and the Ha image in the Green Channel, better than the traditional order of Ha for Red and SII for Green. Thanks for looking; Ed L --- Canopus56 <canopus56@yahoo.com> wrote:
--- Edward Lunt <lunco@yahoo.com> wrote:
Hi Everyone; <snip> With the help of Cynthia Blue, I was able to set up a photo album with a number of images that I have imaged over the past year. <snip>
Ed, really a nice set of images applying the "NASA" three color technique using SII, OIII and Ha filters. (Wasn't that discussed in last month's S&T.) It really brings out the structure of the gas clouds.
What are you using for the night Ha filter?
Where do you buy an SII filter? How much? I though they were running around $80 in ads in S&T.
- Canopus56(Kurt)
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