Hi Greg,
I enjoy using the Masuama eyepieces as well. Even down to f5.3 all though not designed for these fast scopes they produce a very sharp and nice tone in the centre. I prefer them to the Tak Le eyepieces which are also are a 5 element eyepiece but produce a whiter tone and narrower field. (Still have the 5mm and 7.5mm though)
I’ve an old parks gold barlow which I found works really good with these eyepieces for magnification also, it’s a three element barlow and should correct some of the outer distortion when using them in fast scopes. I believe the Orion shorty plus is the same design.
Enjoy
