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Old August 6th 07, 04:40 PM posted to alt.binaries.pictures.astro
Stefan Lilge
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Default ASTRO: 29 hours of High QE imaging of M27

Great image Richard.
The long exposure time certainly paid off. As you mention the sulfur
channel, do you have that channel as a separate image somewhere? I know how
M27 looks in Halpha and OIII, but I don't have a clue about SII.

Stefan

"Richard Crisp" schrieb im Newsbeitrag
...
I began this over the July 4th holiday and took my most recent data last
night, Aug 3

This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha

It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k
@24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line
filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy
Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just
can't beat those TK1024 chips and other such similar chips for going
really deep. The combination of the high QE, the deep wells and the big
pixels, it really makes for a fast camera that is just wonderful for deep
emission line imaging with tight filters.

I am intrigued by the sulfur channel data (red in this palette). I am
seeing detail I've not seen previously in shallower exposures.

I may take some more exposures, but am getting a bit tired of this object
after shooting it for the past month.

http://www.narrowbandimaging.com/m27...2hao3_page.htm