From: "Tim" <tjp314@pacbell.net>

Date: July 16, 2005 8:54:46 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: just wishing

--- In Astro_IIDC@yahoogroups.com, Milton Aupperle <milton@o...> wrote:

The interface they us isn't he problem USC VS USB 2 VS FireWire etc.  

The issue is they use very slow A/D converter and electronics which  

are more concerned about noise than throughput. The faster you move  

data, the more likely your going to get noise in the image from EM  

coupling.

I have USB 2 high speed cameras here and they are just as or more  

noisy than most of the FireWire cameras I have here too.

I had forgotten this.  

The DSI and other cameras that use the interlaced Sony CCD variants  

made for TV cameras are a PITA to work with if there is any motion in  

the images. If your doing interlaced video fields for TV they are  

fine, but not for full frame.

The 3com uses an interlaced  ccd, too.  But it has "quality" options that either dowload 

alternate frames or deinterlace them (I really wouldn't know which, if there's a difference).  

I found that the "medium" quality setting worked best for planets.  But the camera is so 

old now that it's bee superceded  by much faster USB cameras (like the ToUcam).

-Tim.