From: "Alan Friedman" <alan@greatarrow.com>

Date: October 8, 2005 7:51:49 PM MDT

To: <Astro_IIDC@yahoogroups.com>

Subject: Re: [Astro_IIDC] Re: First Astro IIDC shot

Reply-To: <alan@greatarrow.com>

I am thinking about getting a better FW camera (b&W). What exactly will that get 

me? I assume more sensitivity and better S/N <

Yes, more sensitivity and hence an image with better S/N at the comparable 

settings. You will also find that the image is significantly more stable when you 

isolate specific wavelengths with filters than it is in white light. Of course the 

drawback is the added work of capturing and processing multiple streams to 

create a full color image and the added cost of a filterwheel and filters. The 

Unibrain B&W board camera is pretty good but it is plagued by a strange pattern 

that covers a portion (maybe a third) of the chip. It is not an issue with bright 

targets like the moon and sun - but it is a nuisance with planets. I am very happy 

with my DMK camera - Milton and Tim could talk more about the Point Gray 

cameras - they look very good too.

Alan 

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