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I don't know Fred. Consider this. Do you achieve a narrow field of view only with long focal length? Or can you also achieve the same with a wider scope and a small chip effectively giving you a digital zoom.
With the excellent Sony sensors (I know you like QE and these have the highest short of the KAF3200ME) you can get quite a narrow field of view that can come up to the longer focal length scopes of the same aperture.
That's making 2 scopes out of one.
Your 10 inch RCOS with the way smaller ICX694 sensor would get twice the QE in O111 you are getting now and would be super narrow field of view.
Greg.
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