[AZ-Observing] Re: Comet NEAT from Cherry Road - Images

Jeff wrote:
>    How did you get your film developed on a Sunday? 

The 'film' in this case is a 256 Mb Compact Flash card.  I used a Canon 
Digital Rebel camera.  You can set film speed (ISO) on the fly, with the 
downside of higher speed being more noise rather than film grain.

Despite the camera's high cost, I like the advantage of instant results.  
As I have mentioned before, the real downside of long exposures with 
digital cameras is poor response in longer wavelengths, particulary way 
out at the H-alpha line.  See Johannes Schedler's excellent article on the 
subject in the June S&T for more information about astrophotography with a 
digital SLR.  He is the master.

Tom

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