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Old 30-07-2011, 10:30 AM
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Terry B
Country living & viewing

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Join Date: Mar 2006
Location: Armidale
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Quote:
Originally Posted by strongmanmike View Post
This bloat you refer to and have spoken about before..?..are you confusing this with saturation..? How can shallow wells cause star bloat..? Bloat is caused by sensitivity to IR that is not being focused by the optics..? small wells saturate more easily and small pixels can cause over sampling but not bloat...?

As for the choice of cameras...get both use the 8300 for the stars (no blooms) and the 3200 for the rest ...FLI can put a 3200 in a MicroLine can't they..?

Mike
There are other causes for bloat as well. Each star image should be a gausian shape that extends out to infinity even with a perfectly focussed star. For very bright stars that massively saturate the receptor you are able to detect the outer part of the star image as it is bright enough to be detected. Fainter stars will not show this as it will be below the detection threshold for the camera. A shallow well depth will exacerbate this as it is easier to saturate the image.
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