Quote:
Originally Posted by Don Pensack
|
Its a pity all manufacturers dont publish these. *Do any other manufacturers publish this data?
It's also interesting to note, that
1) if it is indeed true that different types of telescopes have different focal plane curvature, that...
2) must be matched to the curvature of the eyepiece used, then...
3) given that the XW's were originally designed for the pentax spotting scopes,
4) half of the range must have been not fit for purpose, by design.
Which doesnt seem right to me. Given the luxury of custom designing high quality eyepieces to suit a particular telescope, why would they design half their range 'wrong' for that purpose? It doesnt make sense.
Markus