Re: [APML] New Ha-Images, California nebula and NGC281

[<wasshuber@inode.at>]

Hi Stuart,

Thank you for your nice words. The advantage to shoot some images during
full moon is something you do not have with film, definitly.

My CDD, the starlight HX916, is not a colour camera. It is a 1300x1030
pixel b/w camera. The sensitivity or QE at Ha is only about 23%. That`s
not much for a CCD, but more than film!

Manfred

> Manfred, I LOVE the California Nebula mosaic! I think as I fall into the
> dark side, I'm going to be an H-Alpha shooter.
>
> Also, isn't the camera you are using a colour camera?
>
> Stuart
>   ----- Original Message -----
>   From: wasshuber
>   To: APML
>   Sent: Saturday, December 13, 2003 10:13 AM
>   Subject: [APML] New Ha-Images, California nebula and NGC281
>
>
>   Hi all,
>
>   Making deep sky images at full moon with a Ha-filter is a funny thing.
> Last weekend I tried some mosaics for the first time.
>
>   The first one is a 3 piece mosaic of the California Nebula, done with
> my ZEISS SONAR 300/4, each image for 6 x 20 min with the Astronomik
> Ha-Filter. The moon was only about 15° away from the nebula!
> http://www.inode.at/wasshuber/gallery/california-2.htm
>
>   The second is a 2 piece mosaic of the NGC 281, done with my VC200L at
> f/6.3, each image for 6 x 20 min with the Astronomik Ha-Filter:
> http://www.inode.at/wasshuber/gallery/ngc281-2.htm
>
>   The HX916 needs a bit more exposure time than other CCD-cameras at Ha,
> but it works. Before I got this CCD, the time around full moon was the
> time for sleeping or other importand things. That is definitly over!
>
>   Have fun,
>   Manfred
>   www.astroimages.at
>
>
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