ASTRO: NGC 6888 Ha+OIII

I managed to get some OIII frames to add to my recent Halpha image of NGC
6888. My OIII filter is for visual use and doesn't block IR light, so I need
an additional IR-block filter. As my filter wheel is too slim to allow for
stacked filters I started the OIII frames without IR-block, but after a bit
more of an hour of wasted time with bloated stars I put the IR-block in
front of the filter wheel, which gave much sharper stars.
I only used the images with IR-block for this image. I used Ha:OIII:OIII for
RGB and a "maximum" combine of Ha and OIII for luminance.

Taken from the middle of Berlin with a 10" Meade ACF at f/5.7 on a G11
mount, SXV-H9 camera, 38x5 minutes for Ha and 25x5 minutes for OIII,
Astronomik 13nm Halpha and OIII filters.

The picture can also be found at
http://ccd-astronomy.de/temp/6888HaOIIIgut.jpg
Halpha:
http://ccd-astronomy.de/temp/6888Ha38x5gut.jpg
OIII:
http://ccd-astronomy.de/temp/6888OIII-IR-25x5gut.jpg

Stefan

Stefan Lilge wrote:

I managed to get some OIII frames to add to my recent Halpha image of NGC
6888. My OIII filter is for visual use and doesn't block IR light, so I need
an additional IR-block filter. As my filter wheel is too slim to allow for
stacked filters I started the OIII frames without IR-block, but after a bit
more of an hour of wasted time with bloated stars I put the IR-block in
front of the filter wheel, which gave much sharper stars.
I only used the images with IR-block for this image. I used Ha:OIII:OIII for
RGB and a "maximum" combine of Ha and OIII for luminance.

Taken from the middle of Berlin with a 10" Meade ACF at f/5.7 on a G11
mount, SXV-H9 camera, 38x5 minutes for Ha and 25x5 minutes for OIII,
Astronomik 13nm Halpha and OIII filters.

The picture can also be found at
http://ccd-astronomy.de/temp/6888HaOIIIgut.jpg
Halpha:
http://ccd-astronomy.de/temp/6888Ha38x5gut.jpg
OIII:
http://ccd-astronomy.de/temp/6888OIII-IR-25x5gut.jpg

Stefan

That combination gives a rather "natural" color and good definition.

My H alpha try from last year was not all that good. I need to try again.

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Looking great Stefan!

Stefan Lilge wrote:
I managed to get some OIII frames to add to my recent Halpha image of NGC
6888. My OIII filter is for visual use and doesn't block IR light, so I need
an additional IR-block filter. As my filter wheel is too slim to allow for
stacked filters I started the OIII frames without IR-block, but after a bit
more of an hour of wasted time with bloated stars I put the IR-block in
front of the filter wheel, which gave much sharper stars.
I only used the images with IR-block for this image. I used Ha:OIII:OIII for
RGB and a "maximum" combine of Ha and OIII for luminance.

Taken from the middle of Berlin with a 10" Meade ACF at f/5.7 on a G11
mount, SXV-H9 camera, 38x5 minutes for Ha and 25x5 minutes for OIII,
Astronomik 13nm Halpha and OIII filters.

The picture can also be found at
http://ccd-astronomy.de/temp/6888HaOIIIgut.jpg
Halpha:
http://ccd-astronomy.de/temp/6888Ha38x5gut.jpg
OIII:
http://ccd-astronomy.de/temp/6888OIII-IR-25x5gut.jpg

Stefan




--
John N. Gretchen III
http://www.tisd.net/~jng3

what an image scale Stefan!

Looks great


"Stefan Lilge" wrote in message
...
I managed to get some OIII frames to add to my recent Halpha image of NGC
6888. My OIII filter is for visual use and doesn't block IR light, so I
need an additional IR-block filter. As my filter wheel is too slim to allow
for stacked filters I started the OIII frames without IR-block, but after a
bit more of an hour of wasted time with bloated stars I put the IR-block in
front of the filter wheel, which gave much sharper stars.
I only used the images with IR-block for this image. I used Ha:OIII:OIII
for RGB and a "maximum" combine of Ha and OIII for luminance.

Taken from the middle of Berlin with a 10" Meade ACF at f/5.7 on a G11
mount, SXV-H9 camera, 38x5 minutes for Ha and 25x5 minutes for OIII,
Astronomik 13nm Halpha and OIII filters.

The picture can also be found at
http://ccd-astronomy.de/temp/6888HaOIIIgut.jpg
Halpha:
http://ccd-astronomy.de/temp/6888Ha38x5gut.jpg
OIII:
http://ccd-astronomy.de/temp/6888OIII-IR-25x5gut.jpg

Stefan