Quote:
Originally Posted by Slawomir
400-800mm domain.
I believe a 10" f/3 Newtonian would be one of strong potential candidates. Large enough aperture to be always seeing limited in average conditions, providing good resolution and also speed for extended objects. I believe TV makes coma correctors capable of correcting such fast Newtonians.
A potentially easier to manage (collimation etc) alternative could be a 130-140mm petzval. Possibly still large enough aperture to remain seeing limited in most typical backyard scenarios, when paired with right-sized pixels.
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Takahashi Epsilon 180ED F2.8. I believe if the collimation goes out its a trip back to Japan.
Also looking at images from the 180 ED compared to same using FSQ106ED the FSQ images were quite a bit sharper with smaller stars.
The advent of these low read noise CMOS cameras seems to have changed the equation a lot as well.
Personally I would be interested in that approach once the sensors get larger.
Greg.