IC1805 - NGC896: Hearth & North Bear Nebulae

Hi all,

a new shots taken Nikon telephoto lens 300mm f/2,8 @ f/4 and ST-10XME
in H-Alpha from the sky of Rome. They were exposed to 6 x 1600 seconds.

Image:
http://www.danilopivato.com/tabulae_...5_300mm_ha.htm

Map:
http://www.danilopivato.com/tabulae_...0mm_ha_map.htm

Kind regards,

Danilo Pivato
--
MyWebSite: http://www.danilopivato.com
MyJobs: http://www.danilopivato.com/tabulae_coeli/index.htm

On 1/12/11 10:37 AM, Danilo Pivato wrote:
Hi all,

a new shots taken Nikon telephoto lens 300mm f/2,8 @ f/4 and ST-10XME
in H-Alpha from the sky of Rome. They were exposed to 6 x 1600 seconds.

Image:
http://www.danilopivato.com/tabulae_...5_300mm_ha.htm

Map:
http://www.danilopivato.com/tabulae_...0mm_ha_map.htm

Kind regards,

Danilo Pivato
--
MyWebSite: http://www.danilopivato.com
MyJobs: http://www.danilopivato.com/tabulae_coeli/index.htm



Thank you, Danilo. I have thought about doing similar. Do you know
the cause of what appears to be very slight diffraction spikes in
the vertical direction on the brighter stars?

Oh yes, Sam! Most likely, the micro lenses are placed before the CCD.
It should be a well-known phenomenon of diffraction to SBIG
Thank you very much!

Danilo Pivato
--
MyWebSite: http://www.danilopivato.com
MyJobs: http://www.danilopivato.com/tabulae_coeli/index.htm



"Sam Wormley" ha scritto nel messaggio
Thank you, Danilo. I have thought about doing similar. Do you know
the cause of what appears to be very slight diffraction spikes in
the vertical direction on the brighter stars?