Quote:
Originally Posted by clive milne
It is probably fair to say that An eXcelon chipped camera on a 22" cassegrain or an ICX-694 on a 26" Newtonian would be functionally equivalent to the CHART32 with the 16803. When you include the mounting, housing and logistics of each choice, the 16803/ASA cassegrain combination comes in dead last if the metric by which we evaluate these systems is a function of signal per dollar. It's only advantage being the number of its pixels. It is also probably fair to say that the QE advantage of the eXcelon alone isn't enough to make it a viable choice over the ICX-694 in the context of instruments even the most ambitious amateurs are likely to deploy, with the assumption being that all three systems are operated such that they are shot noise limited.
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As far as saying "its only advantage is its number of pixels", I would not so easily right off this as being trivial. Mosaic work on galaxys isnt going to be fun, the field of view for a ICX-694 is 15' by 12' on a scope of 2800mm FL, which matches the sampling of the CHART32. There is one other overlooked parameter too well depth.