mewlon?

[vet]

when and why did the old dall-kirks become 'mewlon's'?

[Dave Mitsky]

Mewlon is simply Takahashi's trade name for their line of Dall-Kirkham and Dilworth Cassegrains. (The 300mm is a Dilworth variant.) A D-K Cassegrain is easier to make than any other type of non-catadioptric Cassegrain but has more coma than a classical Cassegrain. According to what a number of owners have reported, its field is probably flatter and sharper than a Schmidt-Cassegrain, but not as good as that of a Ritchey-Chretien Cassegrain.

http://www.scottsquires.com/mewlon_250_vs_fs152.htm

http://www.aajonahfish.com/mewlon_300_review.htm

http://www.cloudynights.com/reviews/mewlon.htm

http://www.regulusastro.com/regulus/papers/takm210/

http://www.almarsad.com/english/TKMewlon-180.html

http://www.takahashiamerica.com/M300.htm

Dave Mitsky

[vet]

thank you---Coulter used to sell the optics dirt cheap---users had problems keeping them aligned, he gave up.