|
I wouldn't use the Hyperion or Stratus for planetary unless your Dob has tracking. Edge performance will be quite poor. I had the ES 8.8mm and it is good. I now have the Pentax XF 8.5mm.
Are you sure that 8 - 9mm will give you the magnification you need for planetary? I might have thought that something in the 6 - 7mm range might be better, depending on the seeing conditions where you observe. Explore Scientific does an excellent 6.7mm model.
|