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ASTRO: Let's try this again. M42



 
 
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  #1  
Old May 14th 12, 02:04 PM posted to alt.binaries.pictures.astro
George[_6_]
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Posts: 124
Default ASTRO: Let's try this again. M42

The following image is a composite of images taken at intervals of 10
seconds, 30 seconds, 1 minute, and 2 minutes for a total exposure time of 50
minutes to create an image of high dynamic range. The reason for the
different exposure times is that the core of the nebula is exceedingly
bright and tends to get washed out in long exposures, while the faint, wispy
reflection nebulosity and the deep colors of the emission nebulosity require
longer exposures. By combining and processing the exposures in a complex
procedure, I managed to preserve most of the detail of the core (including
the trapezium stars) while bringing out a lot of faint details in the
extended portion of the nebula. It isn't perfect (the seeing was also poor
but you take what you can get), but it is my best effort with this object to
date:

Camera:

Hutech Modified Canon T1i with Baader Coma corrector and Baader UV-IR cut
filter

Equipment:

200mm f5 Modified Konus Newtonian OTA
Losmandy G-11 GEM with Gemini Go To
80mm f5 Orion Shorty Autoguide scope with Orion Star Shooter autoguider
Losmandy heavy duty tripod.

Conditions:

Transparency - Good
Seeing - fair
Temperature - 20 Degrees F


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  #2  
Old May 22nd 12, 03:42 AM posted to alt.binaries.pictures.astro
Stephen Paul
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Posts: 99
Default ASTRO: Let's try this again. M42

Very nicely done.
-Steve Paul
--------------------------

"George" wrote in message
m...

The following image is a composite of images taken at intervals of 10
seconds, 30 seconds, 1 minute, and 2 minutes for a total exposure time of 50
minutes to create an image of high dynamic range. The reason for the
different exposure times is that the core of the nebula is exceedingly
bright and tends to get washed out in long exposures, while the faint, wispy
reflection nebulosity and the deep colors of the emission nebulosity require
longer exposures. By combining and processing the exposures in a complex
procedure, I managed to preserve most of the detail of the core (including
the trapezium stars) while bringing out a lot of faint details in the
extended portion of the nebula. It isn't perfect (the seeing was also poor
but you take what you can get), but it is my best effort with this object to
date:

Camera:

Hutech Modified Canon T1i with Baader Coma corrector and Baader UV-IR cut
filter

Equipment:

200mm f5 Modified Konus Newtonian OTA
Losmandy G-11 GEM with Gemini Go To
80mm f5 Orion Shorty Autoguide scope with Orion Star Shooter autoguider
Losmandy heavy duty tripod.

Conditions:

Transparency - Good
Seeing - fair
Temperature - 20 Degrees F

 




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