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Thanks Coen, digesting all of the information in those links ;-)
If I understand correctly, Radians offer a wider FOV and better eye relief than plossls, with minimal distortion and aberrations. Given the poor eye relief on plossls in the higher mm range (2mm, 4mm etc etc), then would it not be wise to consider a Radian style design? I presume the problem that I described with the Andrews 4mm is a result of the poor eye relief of the plossl design?
If I'm digesting some of the information correctly, panoptics are great for wider FOV eyepieces, little distortion etc. Radians might be good for high magnification planetary eyepieces (better eye relief than plossls). I wonder if Ortho style eyepieces might be the go here - they also seem to have better eye relief, but slightly narrower FOV when compared to plossls (and have a flatter FOV and slightly sharper).
I'm basically trying to determine what types of eyepieces will be best for high magnification planetary observation, DSOs and medium eyepieces that fall in between the 2 extremes.
There doesn't really seem to be a page that I've found that gives you the pro/cons of each type of eyepiece design when compared to each other, and recommendations for what type of visual use to use them in...that'd be really *hand* to newbies imho.
Dave
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