ASTRO: one more test shot of SH2-101

this came out a little better: more signal, 9 x 10 minutes binned 2x2 from
the Stinger 450 at 5760mm focal length and f/12.6

halpha from baader, pl9K from fli

ap1200gto mount

excellent guiding Richard

Richard Crisp wrote:
this came out a little better: more signal, 9 x 10 minutes binned 2x2 from
the Stinger 450 at 5760mm focal length and f/12.6

halpha from baader, pl9K from fli

ap1200gto mount





--
John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3

"John N. Gretchen III" wrote in message
m...
excellent guiding Richard


Thanks John

The interesting thing to me is that the scope was designed to support a
somewhat smaller illuminated circle, so I was expecting serious vignetting.

But it worked out great.

The guiding is nothing special: a modified Lumicon Giant Easy guider with an
ST7E stuck in the guide tube.

But I am running at f/12.6 on the 18" and that works out to be about 5760mm
focal length.

Needless to say it is a bit sensitive to wind.