RE: [APML] OT: new Canon 20Da for astrophotography

["Lane, Jason R" <jason.lane@navy.mil>]

They are the same thing...in both cases the filter is removed to take advantage of the fact that the detector's spectral response goes out into the near-IR.  What's so special about the 20Da is that the manufacturer itself is doing it.  And unlike any other photography corporation out there (or so it seems sometimes), Canon is acknowledging that there is a large enough demand for astro or IR photography to market a top-of-the-line product specifically aimed at them..albeit only in Japan.  

-Jason



-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Wei-Hao Wang
Sent: Monday, February 14, 2005 1:47 PM
To: Discussion of Film Astrophotography
Subject: Re: [APML] OT: new Canon 20Da for astrophotography


Hi,

Is 20Da that different from 20D?  The H-a sensitivity increase is only
2.5x, at most as good as the Hutech modified one.  20Da won't be 
available in camera shops.  One has to order 20Da from Canon Japan 
(not USA yet) and wait for 3 months to get it.  I just don't see why we 
need 20Da instead of modified 20D, unless 20Da is much cheaper.

Did I miss something?

Wei-Hao

-- 
________________________________________________________________
Wei-Hao Wang  :)

Institute for Astronomy at University of Hawaii

Address:                       
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