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GSO 8" F4 Newtonian OTA from - £389.00
GSO are famous for the quality of their optics, which are generally accepted to be better than the Chinese standard. This makes the GSO Newtonians excellent for imaging and observing both the deep sky and the moon and planets.
With a low focal ratio of f/4, exposure times are much shorter than with higher focal ratios (About 2/3rds those of an f/5 Newtonian and less than 1/2 those of an F6 APO refractor). This makes the 8" F4 perfectly suited for deep sky imaging in our climate, where clear skies can't be relied upon. It's particularly suitable for one shot colour cameras and observing with AstroVideo cameras.
With the addition of the Baader MPCC the OTA becomes a powerful 8" F4 astrograph, providing pin sharp stars across the full FOV of a 35mm format CCD. Try to find an APO with better imaging performance that doesn't cost many times more than this OTA!
We recommend the use of a laser collimator, which makes the process quick and easy.
What's Included:
8" F4 Newtonian OTA.
2" Crayford focuser with 1:10 dual speed microfocuser and 1.25" adapter
8x50 finder + bracket
Tube rings and Vixen style dovetail
Mirror cooling fan.