i recently tried a a denk II with my celestron nexstar 8 GPS (SCT) using the star sweeper and 19 mm antares w70 eyepieces and noticed that i could not get stars at the periphery and stars in the center in focus at the same time.
after this i checked out the view using a 24 mm panoptic (monocular) and indeed noticed i could not focus edges and center at the same time (especially noticable viewing the moon or big clusters)
i'm ruined
is anyone else troubled by this?
i was wondering if one of the f/6.3 field corrector/flatteners would help.
could it be a collimation issue? it seems ok to me. also, i would think collimation would be more of a difference from one side of the field to another, rather than center to edge.
any suggestions would be appreciated.
thanks
bill
after this i checked out the view using a 24 mm panoptic (monocular) and indeed noticed i could not focus edges and center at the same time (especially noticable viewing the moon or big clusters)
i'm ruined

is anyone else troubled by this?
i was wondering if one of the f/6.3 field corrector/flatteners would help.
could it be a collimation issue? it seems ok to me. also, i would think collimation would be more of a difference from one side of the field to another, rather than center to edge.
any suggestions would be appreciated.
thanks
bill