Thank you John,
I have been considering another EP to add to my humble set but wanted a quality piece of glass this time and was wondering how this info relates to Refractors and SCT's as these are the types of scope I have.
A Meade 8"SCT and SW ED80.
One that would cross between the two around the 10-20mm, higher power on one while lower on the other, a dual purpose EP for want of a better description.
And the other question is "Where do ya get em" Pentax that is as I'm a bit of a Pentax fan.
Thanks for any info.