From: Mark Hanson (markh_at_antispamdomain.not)
Date: Tue Jun 24 2003 - 09:47:00 EDT
Johannes,
Thanks,
I have been using Raw mode with no darks lately and it seems to be working.
When I use darks with raw mode it seems to always have these black holes or
red streaks when stretched, maybe this also has to do with the conversion
from Canons File Viewer software.
Mark
-----Original Message-----
From: Johannes Schedler [mailto:schedler_.at._ctp.at]
Sent: Tuesday, June 24, 2003 12:43 AM
To: digital_astro_.at._yahoogroups.com
Subject: [digital_astro] Re: New image: North America Nebula
Very nice, Mark, even nicely framed!
I could not reach your result with just the white light images, your
sky seems to be darker (same camera!),
Johannes
--- In digital_astro_.at._yahoogroups.com, "Mark Hanson" <markh_.at._t...>
wrote:
> Johannes,
>
> I posted my pic of The North American Nebula so you could see it.
>
> http://btlguce.digitalastro.net/latest.htm
>
> Mark
>
>
> -----Original Message-----
> From: Johannes Schedler [mailto:schedler_.at._c...]
> Sent: Monday, June 23, 2003 2:45 PM
> To: digital_astro_.at._yahoogroups.com
> Subject: [digital_astro] New image: North America Nebula
>
>
> Yesterday I was short of sleep and took a lot of images from
NGC7000
> in this warm midsummer night.
>
> The first results with 5 min at ISO800 and mag 5 sky in white light
> were disappointing, as almost no nebula showed up and the background
> was grey.
>
> So I tried the Lumicon 2" UHC filter with >95 transmission in H-
beta,
> O3 and H-alpha. 10 min shots at ISO1600 resulted in a blue nebula
> with some red lines, but it was there!
> See the details and result after a lot of processing, color shifting
> and blurring with masks to reduce the noise:
>
> http://panther-observatory.com/deepsky.htm#78
>
> Later this week I will include the filtered raws to my 10D review.
>
> Hope to get some more efforts for comparison on this object from you
> (Rick, Mike, Mark?)
>
> Johannes
>
>
>
> Before posting an image to our group please read the space mangement
> guidelines:
> http://groups.yahoo.com/group/digital_astro/files/Photos%20Section%
20Space%2
> 0Management%20Guidelines
>
> Please check the digital_astro FAQ at:
> http://www.szykman.com/Astro/AstroDigiCamFAQ.html
>
> Be sure to visit the digital_astro Gallery and Archive at:
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> http://velatron.com/dca/archive
>
>
>
>
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Before posting an image to our group please read the space mangement
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Please check the digital_astro FAQ at:
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