I cannot pretend to understand those diagrams you linked to so maybe I need to investigate that a little more.
Takitis! (Cats & Casses Edition)
Posted 19 May 2022 - 07:51 AM
To me the Mewlon 180 and 210 are old school telescopes. The 180 came out in 1990 and the 210 a couple of years later. The early 250s were straight Dall Kirkhams like the 180 and 210. I've found there are a very few targets that my 180 does not have a wide enough field to observe. And I actually prefer to use my Edmund RKEs and Baader Classic orthos rather than my ES 24/68, 14/82 and 8.8/82. The only target I find the off axis coma easily noticed is actually the Moon at the edge of the AFOV. I really like the simple pure reflector design of the two smaller Mewlons.
I have to say that having owned both a 180c and now a 210, I miss the wider field of the 180c and it gives up little to the Mewlon 210 on galaxies. The 210 might be a tad better on globular clusters.
- JeremySh likes this