Gday Rat,
The dark rings are a result of my applying too heavy an Unsharp Mask, I'm
afraid. I had to push things a bit to get the fainter bits of the galaxies
to show some detail, but doing so caused the stars to develop the rings
unfortunately.
The 1004x started life as a low-light monochrome CCTV camera module. It uses
a Sony ExView CCD sensor, which is pretty sensitive especially in the near
IR, which is good for stars and galaxies. I modified the camera to do long
exposures, and have added a Peltier cooler for the CCD - the whole thing
lives in a baked bean can. You can find out more at:
http://www.geocities.com/jgroveuk/ExViewMod.html
or:
http://www.geocities.com/jgroveuk/Astrophotography.html
Cheers,
Jon.
<em class="quotelev1">> -----Original Message-----
<em class="quotelev1">> From: sinclan_ratatattat [mailto:polygamus_at_optushome.com.au]
<em class="quotelev1">> Sent: 07 April 2003 13:30
<em class="quotelev1">> To: QCUIAG_at_yahoogroups.com
<em class="quotelev1">> Subject: [QCUIAG] [CONGRATS]Re: 'Leo Trio' mosaic
<em class="quotelev1">>
<em class="quotelev1">>
<em class="quotelev1">> Gday,
<em class="quotelev1">>
<em class="quotelev1">> Very nice indeed.
<em class="quotelev1">>
<em class="quotelev1">> Ive not read all the info on the 1004, could you explain the dark
<em class="quotelev1">> rings around the brighter stars? Is this a processing artifact? Im
<em class="quotelev1">> not experienced enough to know.
<em class="quotelev1">>
<em class="quotelev1">> Still, it looks like a tough task well executed.
<em class="quotelev1">>
<em class="quotelev1">> Rat.
<em class="quotelev1">>
<em class="quotelev1">>
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