Re: Please Help me find a camera!

"Chris L Peterson" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Tue, 25 Nov 2003 14:35:39 -0000, "GrahamH" <[EMAIL PROTECTED]>
wrote:
>
>
> >I compared a Toucam Pro 740k with Creative 4000 Pro in low light. The
Toucam
> >was significantly more sensitive and better SNR. No quantitative data but
> >the difference was easy to see.
>
> I'm not familiar with the Creative 4000 Pro. Do you mean the Logitech
Quickcam
> 4000 Pro? If so, then you did something wrong. The 740K and the QC4000 use
the
> same sensor and the same chipset. The hardware gains are set slightly
> differently, but that can be compensated for programmatically. For good
results
> you don't want to use either near maximum gain anyway.
>
> I've tried both side-by-side for astronomical imaging. There is absolutely
no
> difference in performance.
>

Ah, engage brain before posting eh? Yes I meant Logitech 4000 Pro. My "test"
was not on a telescope, just the standard cameras viewing a night scene. All
settings on auto so the gains would have been higher than you would usually
want. The 740K had more detail with less noise. Maybe it had a longer
exposure capability although IIRC there wasn't a noticeable difference in
frame rate. Your result is more relevant to this group. Are you sure they
use the same chipset?