RE: [ap-gto] A more conventional M42!


Feb 13 8:09 PM

 


----------------------------

#1920 Feb 13 8:09 PM

Hi Everyone,



A while back I posted an image in H-alpha of the M42 region.

But that was a very non-conventional image of the area so

here is a more conventional picture of the same area with

my Traveler at f/4.5 and ST-8E CCD camera.



The image was composed of one hour total of each color (red, green,

and blue) from my light polluted backyard in San Jose, California.

The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.



www.gralak.com/Astro/M42-RGB-AP105.jpg



-Ray Gralah



----------------------------

#1921 Feb 13 10:04 PM

Hi Ray,

That is both an astounding picture and an outstanding one as

well! The Traveler is a good AP-telescope but has a small aperture

and you were able to do this with the Traveler. I mean it's such a

good image. I recall seeing a photo in S & T of Takahashi's FSQ106 -

when it first appeared about two years ago(?). They showed M31 - and

I was amazed at how sharp -or how "three-dimensional" was the

contrast which depicted the gas and dust lanes so distinctly. Color

was not the primary attribute as it is in astrophotographer Jason

Ware's well-known image of M31 taken with a Meade 152mm. I think the

color is also very prominent in your image. It's really what makes

this image. I don't know much about CCD-imaging; what does one hour

each with the three colors mean? Anyway, an excellent view of M42

from you!

Vincent Unger













--- In ap-gto@y..., "Ray Gralak" ray@g...> wrote:

> Hi Everyone,

>

> A while back I posted an image in H-alpha of the M42 region.

> But that was a very non-conventional image of the area so

> here is a more conventional picture of the same area with

> my Traveler at f/4.5 and ST-8E CCD camera.

>

> The image was composed of one hour total of each color (red, green,

> and blue) from my light polluted backyard in San Jose, California.

> The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

>

> www.gralak.com/Astro/M42-RGB-AP105.jpg

>

> -Ray Gralah



----------------------------

#1922 Feb 13 10:27 PM

Hi Vincent,



Thanks for your kind words!



To answer your question about the one hour per CCD color...

most CCD cameras, including the one I use, are monochrome.

So to create a color image you have to take three exposures

of the same object with a different filter (red, green, and

blue) for each exposure. Then with software you can align the

filtered pictures and merge them into a color image.



The actual process is a bit more complicated but that should

give you a rough idea of what I meant.



Take care,



-Ray

> -----Original Message-----

> From: leonard97@... [mailto:leonard97@...]

> Sent: Tuesday, February 13, 2001 10:04 PM

> To: ap-gto@yahoogroups.com

> Subject: [ap-gto] Re: A more conventional M42!

>

>

> Hi Ray,

> That is both an astounding picture and an outstanding one as

> well! The Traveler is a good AP-telescope but has a small aperture

> and you were able to do this with the Traveler. I mean it's such a

> good image. I recall seeing a photo in S & T of Takahashi's FSQ106 -

> when it first appeared about two years ago(?). They showed M31 - and

> I was amazed at how sharp -or how "three-dimensional" was the

> contrast which depicted the gas and dust lanes so distinctly. Color

> was not the primary attribute as it is in astrophotographer Jason

> Ware's well-known image of M31 taken with a Meade 152mm. I think the

> color is also very prominent in your image. It's really what makes

> this image. I don't know much about CCD-imaging; what does one hour

> each with the three colors mean? Anyway, an excellent view of M42

> from you!

> Vincent Unger

>

>

>

>

>

>

>

> --- In ap-gto@y..., "Ray Gralak" ray@g...> wrote:

> > Hi Everyone,

> >

> > A while back I posted an image in H-alpha of the M42 region.

> > But that was a very non-conventional image of the area so

> > here is a more conventional picture of the same area with

> > my Traveler at f/4.5 and ST-8E CCD camera.

> >

> > The image was composed of one hour total of each color (red, green,

> > and blue) from my light polluted backyard in San Jose, California.

> > The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

> >

> > www.gralak.com/Astro/M42-RGB-AP105.jpg

> >

> > -Ray Gralah

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

>



----------------------------

#1928 Feb 14 8:48 PM

Hi Ray,



Congratulations on another AMAZING image! Your hard work and talent

truly bring out the beauty of one of God's most awesome creations. I

am just curious to know a bit more about how you did it. I assume

that your ST8E must be the non-antiblooming variety. Is that correct?



If so how do you deal with blooming. You indicated that you exposed

each color for 1 hour. How many sub-exposures make up each hour long

exposure? Did you have to repair blooming in the sub-exposures? Do

you sum each color and then repair the blooms, repair the blooms

before summing each color, or repair blooms after summing all colors

together to form the tri-color image?



Sorry for all the questions? I would just like to learn more about

how you created this incredible image. I zoomed in on some of the

stars in the image. Your guiding and focus look spot on!



Any other details you care to share would be greatly appreciated.

I'm sure many others on this group beside myself aspire to someday

turn out images like that one!



Sincerely,



Jerry Zakariasen



--- In ap-gto@y..., "Ray Gralak" ray@g...> wrote:

> Hi Everyone,

>

> A while back I posted an image in H-alpha of the M42 region.

> But that was a very non-conventional image of the area so

> here is a more conventional picture of the same area with

> my Traveler at f/4.5 and ST-8E CCD camera.

>

> The image was composed of one hour total of each color (red, green,

> and blue) from my light polluted backyard in San Jose, California.

> The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

>

> www.gralak.com/Astro/M42-RGB-AP105.jpg

>

> -Ray Gralah







----------------------------

#1929 Feb 14 9:07 PM

Hi Jerry,



Thanks!



Each color is comprised of 60 one-minute exposures. Even with

one minute exposures there was serious blooming on several

of the stars in the images. It would be too tedious to fix them

in each image so I registered and combined each set of 60 images

(one set for each color) with MIRA AP. I then combined the three

resulting "color planes" with MaximDL into an RGB. I then used

DDP and a gamma stretch to bring out faint outlying detail.



I then saved the image as a 16-bit per color TIFF image and

brought it into Photoshop. In Photoshop I repaired the blooming

spikes, stretched the image even more and made minor zonal

adjustments to the color balance (necessary because of light

pollution).



-Ray Gralak

> -----Original Message-----

> From: j.zakariasen@... [mailto:j.zakariasen@...]

> Sent: Wednesday, February 14, 2001 8:48 PM

> To: ap-gto@yahoogroups.com

> Subject: [ap-gto] Re: A more conventional M42!

>

>

> Hi Ray,

>

> Congratulations on another AMAZING image! Your hard work and talent

> truly bring out the beauty of one of God's most awesome creations. I

> am just curious to know a bit more about how you did it. I assume

> that your ST8E must be the non-antiblooming variety. Is that correct?

>

> If so how do you deal with blooming. You indicated that you exposed

> each color for 1 hour. How many sub-exposures make up each hour long

> exposure? Did you have to repair blooming in the sub-exposures? Do

> you sum each color and then repair the blooms, repair the blooms

> before summing each color, or repair blooms after summing all colors

> together to form the tri-color image?

>

> Sorry for all the questions? I would just like to learn more about

> how you created this incredible image. I zoomed in on some of the

> stars in the image. Your guiding and focus look spot on!

>

> Any other details you care to share would be greatly appreciated.

> I'm sure many others on this group beside myself aspire to someday

> turn out images like that one!

>

> Sincerely,

>

> Jerry Zakariasen

>

>

> --- In ap-gto@y..., "Ray Gralak" ray@g...> wrote:

> > Hi Everyone,

> >

> > A while back I posted an image in H-alpha of the M42 region.

> > But that was a very non-conventional image of the area so

> > here is a more conventional picture of the same area with

> > my Traveler at f/4.5 and ST-8E CCD camera.

> >

> > The image was composed of one hour total of each color (red, green,

> > and blue) from my light polluted backyard in San Jose, California.

> > The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

> >

> > www.gralak.com/Astro/M42-RGB-AP105.jpg

> >

> > -Ray Gralah

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

>



----------------------------

#1930 Feb 15 9:56 AM

Wow - a beautiful image, Ray. The Flame has an almost iridescent quality to

it; you've captured subtle color variations extremely well. The quality of

the data is just superb.



Ron Wodaski

The New CCD Astronomy

www.newastro.com



-----Original Message-----

From: Ray Gralak [mailto:ray@...]

Sent: Tuesday, February 13, 2001 8:10 PM

To: AP-Goto; ap-ug@yahoogroups.com

Subject: [ap-gto] A more conventional M42!





Hi Everyone,



A while back I posted an image in H-alpha of the M42 region.

But that was a very non-conventional image of the area so

here is a more conventional picture of the same area with

my Traveler at f/4.5 and ST-8E CCD camera.



The image was composed of one hour total of each color (red, green,

and blue) from my light polluted backyard in San Jose, California.

The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.



www.gralak.com/Astro/M42-RGB-AP105.jpg



-Ray Gralah







To UNSUBSCRIBE, or for general information on the ap-gto list

see groups.yahoo.com/group/ap-gto



----------------------------

#1931 Feb 15 12:55 PM

Gorgeous Ray!

Joe

----- Original Message -----

From: "Ray Gralak" ray@...>

To: "AP-Goto" ap-gto@yahoogroups.com>; ap-ug@yahoogroups.com>

Sent: Tuesday, February 13, 2001 11:09 PM

Subject: [ap-gto] A more conventional M42!





> Hi Everyone,

>

> A while back I posted an image in H-alpha of the M42 region.

> But that was a very non-conventional image of the area so

> here is a more conventional picture of the same area with

> my Traveler at f/4.5 and ST-8E CCD camera.

>

> The image was composed of one hour total of each color (red, green,

> and blue) from my light polluted backyard in San Jose, California.

> The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

>

> www.gralak.com/Astro/M42-RGB-AP105.jpg

>

> -Ray Gralah

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>







----------------------------

#1932 Feb 15 2:03 PM

Thank you, Joe and Ron, for your nice comments!



-Ray

> -----Original Message-----

> From: Joe Marietta [mailto:jmarietta@...]

> Sent: Thursday, February 15, 2001 12:56 PM

> To: ap-gto@yahoogroups.com

> Subject: Re: [ap-gto] A more conventional M42!

>

>

> Gorgeous Ray!

> Joe

>

> ----- Original Message -----

> From: "Ray Gralak" ray@...>

> To: "AP-Goto" ap-gto@yahoogroups.com>; ap-ug@yahoogroups.com>

> Sent: Tuesday, February 13, 2001 11:09 PM

> Subject: [ap-gto] A more conventional M42!

>

>

> > Hi Everyone,

> >

> > A while back I posted an image in H-alpha of the M42 region.

> > But that was a very non-conventional image of the area so

> > here is a more conventional picture of the same area with

> > my Traveler at f/4.5 and ST-8E CCD camera.

> >

> > The image was composed of one hour total of each color (red, green,

> > and blue) from my light polluted backyard in San Jose, California.

> > The Traveler was riding piggyback on my 155EDFS and AP1200 GTO.

> >

> > www.gralak.com/Astro/M42-RGB-AP105.jpg

> >

> > -Ray Gralah

> >

> >

> >

> > To UNSUBSCRIBE, or for general information on the ap-gto list

> > see groups.yahoo.com/group/ap-gto

> >

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

>



Contact Us
This Site's Privacy Policy
Google's privacy policies

S
e
n
i
o
r
T
u
b
e
.
o
r
g