Thread: DSI vs DSLR
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Old 10-02-2009, 11:04 AM
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Tunnel Vision

AlexN is offline
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
you likely wont need the coma corrector on the DSI as its chip will not likely extend into the area of the light path that is affected by coma... I know that if I cropped 10% off the left and right sides of images taken with the QHY8 in my refractor, the field appears very flat indeed.. the DSI chip is quite a bit smaller than the QHY8, so you should be fine...

In the SCT you could use an F/3.3 reducer to get a decent field of view, and then you've also got quite a bit of aperture sucking down quite a lot of light... should make for some good photos..

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