Quote:
Originally Posted by Octane
I would like to aim for 2m focal length, as I'd like to start shooting galaxies.
Deep Sky Instruments look good, too.
I also understand that the cheaper options would require a $1K investment in a focuser, too.
H
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2 metres at 250mm aperture is F8 which will be slowish. You'll need to do really long exposures and extra total integration time.
ODK 10 at F6.8 is 1700mm which is pretty close and probably great for most seeing with the current smaller pixelled cameras.
Tak BRC250 worked well with Microline 8300 for galaxies at F5. You can get Tak extenders to lengthen the focal length as well.
Better to use a shorter focal length and smaller pixels.
Shiraz is doing pretty well with galaxies using an F4 250mm Newt.
Deep Sky 2nd hand if you can find one. They bought out RCOS and have discontinued their amateur product line to chase Military jobs.
Bottom line Humi I think bang for buck the GSO RCs whilst perhaps a project are hard to beat. No wonder Deep Sky Instruments changed direction as the GSO product must have killed their sales.
Greg.