Quote:
Originally Posted by Don Pensack
John,
Try the T4's in the daytime-- (look at any straight line) they have substantial rectilinear distortion, in the form of pincushion. Maybe they don't have as much AMD as the apparent fields would imply, but they are not corrected for rectilinear distortion.
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I have all 3 of the T4's but I've never tried them in the daytime because I don't own a refractor, other than finderscopes, binoculars and rifle scopes.
I am only repeating what Al Nagler told me in about 2007, when I asked him some questions about them. I was only drinking coffee at the time so pretty sure I interpreted him correctly.
Cheers
John B