I had the 14mm for a few weeks, and I just didn't find it comfortable to use. There was severe kidney beaning and blackouts and I just couldn't consistently get my eye in the right spot.
There was also a lot of internal reflections on bright stars, like little moths flying around. The edge sharpness was only marginally better (had to really look for it) than the 15mm GSO plossl I compared it too, and FOV was comparable also.
In the end, I couldn't find any reason why it would be a better purhcase than my 15mm GSO plossl, and the plossl is probably half the price.
Maybe the 14mm isn't the best focal length for them, maybe they're better in the shorter focal lengths, but I certainly wouldn't recommend them without trying them first, or at least have the option to take it back if you don't like it.
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