|
Here is a real world example of how a double (Antares) appears in a Vixen ED102S F9 4" Refractor versus a Tak Mewlon 180 (7") F12 DK.
The Vixen image was taken using a stacked x5 PowerMate and Vixen ED x2 Barlow at an efl of 9108mm at F90 using a Meade LPI back in 2005.
The Mewlon 180 image was taken with a Tak Extender x1.6 at an efl of 3456mm at F19.2 more recently in 2013.
Cheers
Dennis
|