2020BC
09-05-2009, 07:08 PM
Moonshine is a pain, but with an Oxygen (O-III) filter on an unmodified DSLR at least you can grab an image of a bright nebula.
Here's Eta Carina bubbling away in oxygen. Looks like there's plenty of the stuff out there. Maybe in a gazillion years it will find its way to a habitable planet.
This pic demonstrates that moonlit nights needn't be a total loss.
It also demonstrates that if you've only got an unmodded camera and you get tempted to reduce the blue and green channels, in favor of cranking up the red channel, you could be throwing away lots of data.
Subject: Eta Carina with Oxygen (O-III) filter
Exposure: 48x2mins
Scope: 8" Meade Schmidt Newt
Mount: EQ-6 autoguided
Wider blue-green pic is here (http://www.zodiaclight.com/pic.htm?photo1=images/EtaCarina0-IIISN8mpcc48x2mins1600isoGuided03Ma y09Try1BlueGreenWeb1280.jpg&text=EtaCarinaNebulaInOxygen-III)
Wider grayscale pic is here (http://www.zodiaclight.com/pic.htm?photo1=images/EtaCarina0-IIISN8mpcc48x2mins1600isoGuided03Ma y09Try1WidestWall1280.jpg&text=EtaCarinaNebulaInOxygen-III)
Here's Eta Carina bubbling away in oxygen. Looks like there's plenty of the stuff out there. Maybe in a gazillion years it will find its way to a habitable planet.
This pic demonstrates that moonlit nights needn't be a total loss.
It also demonstrates that if you've only got an unmodded camera and you get tempted to reduce the blue and green channels, in favor of cranking up the red channel, you could be throwing away lots of data.
Subject: Eta Carina with Oxygen (O-III) filter
Exposure: 48x2mins
Scope: 8" Meade Schmidt Newt
Mount: EQ-6 autoguided
Wider blue-green pic is here (http://www.zodiaclight.com/pic.htm?photo1=images/EtaCarina0-IIISN8mpcc48x2mins1600isoGuided03Ma y09Try1BlueGreenWeb1280.jpg&text=EtaCarinaNebulaInOxygen-III)
Wider grayscale pic is here (http://www.zodiaclight.com/pic.htm?photo1=images/EtaCarina0-IIISN8mpcc48x2mins1600isoGuided03Ma y09Try1WidestWall1280.jpg&text=EtaCarinaNebulaInOxygen-III)