Hi Greg,
Attached is the field you captured overlayed on USNO A2.0 star field courtesy
Cartes Du Ciel (lim mag clipped on A2 for the overlay)
Shows NGC 4336/4293/4334/4394 and a bonus M85!
Seems to limit around mag 13???
Gene
http://www.geocities.com/lynol1000
--- In QCUIAG_at_yahoogroups.com, "Greg Beeke" <greg.beeke_at_b...> wrote:
<em class="quotelev1">> Hi,
<em class="quotelev1">>
<em class="quotelev1">> It can be revealed that I am the one with the permanent smile on my
face.
<em class="quotelev1">>
<em class="quotelev1">> The ICX414AL is the big brother of the ICX424AL CCD. The CCD size is
0.5", with 9.9 micron square pixels.
<em class="quotelev1">> It was clear tonight so I decided to quickly hot-melt-glue it into
an old case and give it first light. The attached image is a stack of
33 x 2 second frames at 100% gain. The mount was a Black & Decker
Workmate, so tracking is sub-optimal ;^)). I'm not sure of the
target, but I was trying to aim in the region of Coma Berenices, to
see if I could pick up any galaxies. I think that I may have
succeeded. If any one recognises the area or has any tools to match
it, I'd be grateful as I'd like to determine the limiting maginitude.
North is Up, East is Left, Alt-Az orientation. FOV is 161x121arcmin
(135mm telephoto lens at f/2.5).
<em class="quotelev1">>
<em class="quotelev1">> The camera appears to be pretty sensitive and dark current is
remarkably low. A 60 dark is attached, but this is rather academic as
skyglow washed out everything, when using 10s at 100% gain :^)) at my
rural site.
<em class="quotelev1">>
<em class="quotelev1">> Still a long way to go to prove the design, but I'm pleased and
relieved that the first images are promising (I haven't even removed
the protective film from the CCD window yet).
<em class="quotelev1">>
<em class="quotelev1">> Many, many thanks to Steve Chambers for his advice, and
encouragement to give this chip a go, and of course for the original
long exposure mod and the ground-breaking 424 camera.
<em class="quotelev1">>
<em class="quotelev1">> Cheers
<em class="quotelev1">>
<em class="quotelev1">> Greg
<em class="quotelev1">> 52N6 1W22
<em class="quotelev1">> www.greg.beeke.btinternet.co.uk
__________________________________________________
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