Low Resolution Spectrograph Project - 200mm with SA100 
Uploaded 9/7/13

 
For
            this set of images, the 1.25" diameter Star Analyzer was
            mounted in front of the objective lens on our 200mm zoom lens
            for our Canon XTi (Hutech modified for extended red response).
            Exposures up to 1 mins were taken of the Orions belt and Sword
            regions, and the accompanying dark frames to match. Spectral
            lines are hard to see here, so in the second image in a set,
            I stretched the images perpendicular to the spectral dispersion
            in Photoshop to make the noisy lines easier to see. I think I
            may have had the ISO set too high at 800 which resulted in way
            too much noise, but this first set ever shows a direction to
            head for improvement!
Click on images below for a larger view!
 
 
 The
            three belt stars of Orion on the left have corresponding spectra
            to the right.
 
 
 Vertically
            extended image.
 
 
 Sword
            region, 1 min exposure.
 
 
 Extended
            image.
 
 Crop
            of above image labeling individual spectral images.


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