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The PI HDR tool is useful for composing images from different telescopes that wouldn't ordinarily work with the usual integration tools etc. Ivo makes a very good point regarding dynamic range and lower ISO.
As far as the core is concerned a number of short exposures, just enough to get the stars in the Trapezium, will solve the blow out. HDR is useful for combining these. If the exposures are too short you might have difficulties with PI.
Last edited by rcheshire; 12-11-2012 at 09:19 PM.
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